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Privacy Policy Effective Date: April 28, 2026 / Privacy Policy / 1. Data Collection We follow the principle of "Data Minimization." We only collect information strictly necessary for the core functionality of the App: Account Information: Your email address, used for unique identification and synchronization of access permissions. Technical Data: Mobile device model, operating system version, and unique device identifier. This is used solely to optimize NFC power transmission and communication parameters for your specific hardware. Operation Logs: Time of unlock, Device ID, and User ID. These logs allow you to monitor the security of your locks. 2. Data We DO NOT Collect To protect your privacy, we explicitly state that we DO NOT collect: Precise or approximate Geolocation data. Contact lists or social media profiles. The serial number of your phone's internal NFC chip. We do not write any private data into your phone's Secure Element (SE). 3. Permissions Notice (NFC and Location) On certain versions of the Android operating system, enabling NFC communication may trigger a system-level request for Location Permissions. We hereby declare that this is a technical requirement of the OS for low-level hardware communication only. We do not access, store, or upload your location data. 4. Data Storage and Retention Cloud Storage: For the Online Version, your data is stored securely on Alibaba Cloud servers. We implement industry-standard encryption to protect your data during transmission and at rest. Retention Period: Logs are retained permanently to provide you with a full history of device access. Data is deleted only when: You manually delete a specific device or clear the logs. You choose to delete your account. Standalone Version: For the Standalone (Offline) version of the App, all data is stored locally on your mobile device. We have no access to, nor do we store any copies of, your local data. 5. Global Privacy Compliance GDPR (EU): We respect your "Right to be Forgotten." You may exercise your right to access, rectify, or erase your personal data via the App at any time. CCPA (USA): We do not sell your personal information to third parties. No 3rd-Party SDKs: This App does not integrate any third-party advertising, analytics, or social SDKs that track user behavior across other apps or websites. 6. Your Rights and Control You have full control over your data. Through the App settings, you can: Review and export your operation logs. Revoke shared access permissions at any time. Permanently delete your account and all associated data. 7. Contact Us If you have any questions regarding this Privacy Policy, please contact us at: KENRONE (HONG KONG) LIMITED Email: sales@kenrone.com

KENRONE: NFC battery-free lock manufacturer since 2002. 450+ employees, 23,000 m² factory in Shenzhen. ISO certified. OEM and ODM welcome. About KENRONE KENRONE, founded in 2002, has been continuously evolving in the security locking industry—from mechanical locks to electrically controlled and smart locking solutions. In recent years, we have built a battery-free lock product line (battery-free at the lock) supported by system-managed access control for industrial cabinets and facility applications. Today, we offer 20+ battery-free lock models, backed by in-house manufacturing and customization-ready delivery. ISO Certified Factory OEM & ODM Support Exported Worldwide 20+ Years Manufacturing Talk to the factory The KENRONE Engineering Team Home > About Us > Certifications Certified to International Standards Every product is manufactured and tested to international standards. ISO 9001:2015 Quality Management System Certification Authority: ACM INTERNATIONAL CERTIFICATION LIMITED Certificate Number： 91441381MADHGKBAXC ISO 14001:2015 Environmental Certification Authority: ACM INTERNATIONAL CERTIFICATION LIMITED Certificate Number： 22ACM15935R Patent Certification battery-free lock system Certification Authority: China Copyright Protection Center Certificate Number： 2025SR0067282 CE Certification European Conformity Certification Authority: ZKT Technology Co., Ltd. Certificate Number： ZKT-240528L5853C FCC Certification US Compliance Certification Authority: ZKT Technology Co., Ltd. Certificate Number： ZKT-240528L5854C ROHS Certification Materials Safety Certification Authority: ZKT Technology Co., Ltd. Certificate Number： ZKT-240528L5855C Inside the Factory Full In-House Production CNC machining, die-casting, injection molding, assembly, testing and warehousing — all under one roof. CNC-Drehmaschine CNC-Langdrehautomat 280-Tonnen-Druckgussmaschine Druckguss-Produktionslinie Spritzgussmaschine Schälmaschine Fräsmaschine Poliermaschine Schweißmanipulator Rundtakt-Gewindeschneidmaschine We have a clear advantage in the field of NFC battery-free locks KENRONE NFC battery-free locks are built for real projects. With faster unlocking, competitive factory pricing, and a growing product line, we help customers find a practical lock solution for more applications. Faster Unlocking Recent technical upgrades have greatly improved the unlocking speed. Better Value As a manufacturer, we offer competitive pricing while keeping quality under control. More NFC Lock Options Our NFC battery-free lock series continues to expand for cabinets, padlocks, lock cylinders, cable locks, and custom projects. OEM / ODM Turn Your Locking Concept Into Production Partner with a manufacturer that owns the full process — from industrial design and firmware to tooling, assembly and global shipping. Start OEM Project Resource Center Everything You Need to Specify Catalogs, certificates, downloads and guides to support your sourcing decision. Product Catalogs Battery-free lock line-up Find product types Certifications ISO, CE, FCC and RoHS documents. View Certificates APP Download using the KENRONE NFC App Get APP User Manuals Installation and operation guides. Read Manuals Video Watch our rich product videos Watch videos Discuss Your NFC Locking Project Contact KENRONE to discuss your application, access workflow, lock format, and project requirements. Request a Project Discussion

Battery-free NFC locks powered by a smartphone tap, with app-managed access, unlock records and OEM support from KENRONE. No Lock-side battery · no wiring · phone-powered NFC NFC Battery-Free Lock System for Commercial Access KENRONE combines battery-free NFC lock hardware with smartphone unlocking, app-based authorization and access records. At the tap, the phone provides both the power and the credential, so the lock itself needs no built-in battery, wiring or gateway to open. Explore Lock Products Discuss Your Locking Project 20+ Years Manufacturing 400+ Employees 100+ Export Countries 20+ R&D Engineers 23,000m² Factory Area Why upgrade Why Upgrade to an NFC Battery-Free Lock System? KENRONE NFC battery-free locks are built for real projects. With faster unlocking, competitive factory pricing, and a growing product line, we help customers find a practical lock solution for more applications. Reduce Key Management Move away from distributing, collecting, and tracking large numbers of mechanical keys. Avoid Lock-Body Battery Maintenance The lock itself does not rely on a built-in battery, helping reduce repeated battery checks across multiple locking points. Make Access More Flexible Use mobile authorization to support different users, changing tasks, and temporary access needs. Improve Traceability Unlocking actions can be managed and reviewed through the system, making access easier to follow. The hardware layer A Shared Platform Across Multiple Battery-free NFC Smart Locks Formats Choose the hardware that matches the opening; keep one battery-free NFC access approach across the project. NFC Cam Lock Cabinets, drawers and locker doors NFC Padlocks Gates, enclosures and distributed assets NFC Euro Cylinder Compatible Euro-profile door retrofits NFC Self-Storage Cylinder Lock Compatible self-storage door hardware Storage Disc Lock Storage-unit hasps and disc-lock applications NFC Bike Lock Managed bicycle and light-mobility parking NFC Key Box Controlled access to stored physical key How it works One Tap Powers and Verifies the Lock An authorized user opens the KENRONE app and places an NFC-enabled phone against the lock's NFC area. Within 1 cm—normally with the phone touching the lock—the phone energizes the electronics, the lock verifies permission and the mechanism releases. The current generation typically completes the sequence in 0.5–2 seconds under suitable phone, placement and authorization conditions. 01 Assign access — Add, change or revoke user permissions in the KENRONE app or connected management system. 02 Tap the lock — The smartphone supplies energy and an encrypted credential over NFC. 03 Verify and open — The lock verifies permission locally and releases; supported deployments retain an unlock record. inside the system What the Management Layer Does The KENRONE app and management platform support user authorization, permission changes and unlock records. Documented API and SDK resources are available for qualified integration projects. Offline unlocking can be supported by the deployment design; confirm the required authorization and synchronization workflow during specification. Authorization Layer App / management Access is assigned, changed, and removed through the App or management system — across different users, tasks, and temporary needs. Records Layer Traceability Unlocking events can be recorded, managed, and reviewed, so access across many locks and users stays easier to follow. Integration Layer API & SDK An open platform with documented API and SDK, so integrators and OEM partners can connect the locking layer into their own systems. Open integration Manufactured for Integration and OEM Projects KENRONE has worked in locking products since 2002 and has focused on battery-free NFC locks since 2020. Product design, manufacturing, assembly and testing are supported from our Huizhou facility. We work with lock brands, cabinet and locker manufacturers, integrators and project buyers on standard products and qualified OEM/ODM programs. For integrators & OEM // open integration platform API documented endpoints SDK for app & system integration connect → your own management platform // no closed-app workaround Solutions Where NFC Powered Locks Fit NFC battery-free locking is especially useful where access needs to be managed across multiple locks, multiple users, or multiple locations. Learn more about the solution Cabinet Locking Learn More Smart Locker Locking Learn More Self-Storage Doors Learn More Residential Properties Learn More Secure Storage Products Learn More Server Cabinets Locking Learn More File Cabinet Locking Learn More Shared Locker Locking Learn More Choosing a method Mechanical Locks, Battery-Powered Smart Locks, or NFC Battery-Free Locks? Different locking methods solve different problems. The right choice depends on how many locks you manage, how often access changes, and how much maintenance your project can accept. Comparison term Mechanical Locks Battery-Powered Smart Locks NFC Battery-Free Locks Better for Simple use Feature-rich smart access Commercial low-maintenance digital locking Unlock records No Depends on system Can be supported Digital authorization No Usually yes Yes Battery maintenance None Required No battery inside the lock Key management Higher Lower Lower Lock-body battery No Yes No Unlocking Physical key App / code / card / fingerprint Smartphone NFC Why KENRONE Discover KENRONE. Choose with Confidence. KENRONE has years of experience in locking products, from mechanical locks to electronic and battery-free systems. We focus on making NFC locking practical for real commercial projects, not just adding smart features for the sake of it. Locking Product Experience Built on long-term work in mechanical, electronic, and battery-free locking products. Focus on NFC Battery-Free Locking We develop locks and related products around a clear low-maintenance direction. In-House Development and Production Key design, manufacturing, and quality processes are managed within KENRONE. Project-Oriented Support We help customers match lock formats, applications, and access workflows more clearly. About Us clear advantage We have a Clear Advantage in the field of NFC battery-free locks KENRONE NFC battery-free locks are built for real projects. With faster unlocking, competitive factory pricing, and a growing product line, we help customers find a practical lock solution for more applications. Faster Unlocking Recent technical upgrades have greatly improved the unlocking speed. Better Value As a manufacturer, we offer competitive pricing while keeping quality under control. More NFC Lock Options Our NFC battery-free lock series continues to expand for cabinets, padlocks, lock cylinders, cable locks, and custom projects. News & Blog Related Resources Start a project Specify the Right Battery-Free NFC Lock for Your Project Send the opening type, door or panel dimensions, access workflow, expected quantity range and integration needs. KENRONE will recommend the next compatibility check. Discuss Your Locking Project Frequently asked questions Does the lock contain a battery? Does it need Wi-Fi to open? How close must the phone be? How fast does it open? Can it connect to our platform? Are you a manufacturer? Or are you a distributor or trading company?

Drop-in NFC cam lock for cabinets, lockers, and enclosures. Tap a phone to unlock — no batteries inside, no keys to copy, no shared codes to leak. Fits standard 19mm and 22mm cam lock cutouts. Built for office furniture, IT cabinets, and managed lockers. Battery-Free NFC Smart Cam Lock Factory Battery-Free NFC Keyless Cam Lock for Cabinets Upgrades Retrofit any keyed cabinet to NFC access. No wiring. No batteries. No more lost keys. ✓ Zero Battery Inside — Powered by Your Phone ✓ Tap-to-Unlock with Any NFC Smartphone ✓ Drop-In Replacement for Standard Cam Locks Request a Compatibility Review Home / NFC Cam Lock / Cam Lock Type Choose the Right NFC Cam Lock Format for Your Application round knob cam lock wing knob cam lock thumb turn cam lock replace the old cam lock When Traditional Master Cam Locks Start to Feel Limiting Keyed cam locks Simple and affordable — until you're juggling dozens of keys across multiple Master-key cam locks Fewer keys to carry — but every lost key still means rekeying the entire system. Combination cam locks Goes keyless — but sharing access, rotating codes, and tracking usage are still a hassle. Need keyless access, centralized control, and zero battery upkeep? That's exactly what NFC battery-free cam locks are built for. Use a True Keyless Cam Lock Using a Keyless Cam Lock Doesn't Mean Using a Combination Cam Lock Explore NFC Battery-Free Lock System Most "keyless" cam locks just replace the key with a dial — trading one inconvenience for another. We took a different route. Tap your phone on the lock — it unlocks. The same tap also powers it. No dial. No code. No battery. Management Centralized Management — One Cabinet or One Hundred, Same Cam Lock, Smarter System. For one cabinet, it's a 5-minute upgrade from a mechanical cam lock. For a hundred, it becomes a centralized NFC system — every permission, every unlock, every user, fully tracked from the cloud. Workflow A Simple Workflow for Users and Administrators For Administrators Add users Assign Cam lock access Adjust permissions View unlock logs For Users Open the App Tap the phone to the Cam lock Unlock with granted permission Complete the task Solution Where NFC Keyless Cam Locks Fit Storage cabinets Utility boxes Office cabinets vending machine School Lockers Comparison Keyed Cam Lock, Master-Keyed, Combination Cam Lock, or NFC Cam Lock? Every cam lock solves the same job — keeping a cabinet closed. What separates them is what happens next: who can open it, how access is tracked, and how much work it takes to manage at scale. Here's how the four most common options stack up — and where NFC battery-free cam locks fit in. Comparison Keyed Cam Lock Master-Key Cam Lock Combination Cam Lock NFC Battery-Free Cam Lock Unlocking Method Mechanical Key Standard Key + Master Key Combination Dial Smartphone NFC Tap Keyless No No Yes Yes Multi-Lock Management Basic Easier than standard keys Basic Built for centralized management Access Records None None Usually none Supported via cloud system Battery Inside Lock None None Usually none None Best For Simple single cabinets Multi-cabinet setups still using keys Small-scale keyless needs Commercial cabinets & digital upgrade projects Looking for a battery-free NFC cam lock for cabinet upgrades or managed locking projects? Contact KENRONE to discuss your cabinet type and project requirements. Request a Project Discussion More NFC Battery-free Smart Lock Products NFC Storage unit Cylinder Lock NFC Padlock NFC Euro Cylinder Lock NFC Key Box NFC Bike Lock NFC Storage Padlock News & Blog Related Resources

Discover NFC battery-free lock system solutions from KENRONE. Designed for cabinets, equipment, and distributed assets, our locks support phone unlocking, access management, and unlock records. Solutions One battery-free platform. Every locking scenario. Start with the opening and access workflow—not a feature list. Choose the application below to see the compatible lock layer, required measurements and management boundary. Explore Solutions Talk to the factory / Solutions / Self Storage Access Control Self Storage Solution Give tenants keyless access to their unit and manage the whole facility remotely — grant, transfer or revoke access without visiting the site or re-keying. Cabinet Locking Cabinet Locking Solution Secure high-value infrastructure and sensitive documents with keyless, audited access — no drilling for power, no cabling. Server Cabinet Locking Protect data-centre racks and IT infrastructure with per-user access logs. Electrical Cabinet Locking Restrict power-distribution and control panels to authorized technicians. File Cabinet Locking Control who opens document and record storage, with a full audit trail. Locker Locking Locker Locking Solution Flexible access for personal and communal lockers — assign a locker for a term, or rotate it between users on demand. Assigned / Private Locker One user, one locker — for schools, gyms and workplaces. Shared / Rotating Locker Multi-user access for gyms and communal spaces, freed and reassigned instantly. Explore solutions Purpose-built for how spaces are actually secured Each solution runs on the same NFC lock family and the same management app. Self-storage Electrical cabinets File cabinets School lockers Gym lockers Employee lockers Vending machines Game consoles Server cabinets Luggage storage Mailboxes Secure cash boxes Applications Twelve places KENRONE locks go to work The same battery-free NFC platform adapts across industries and enclosures. CONTACT US Not sure which solution fits? Tell us about your cabinets, lockers or facility and we’ll recommend the right lock and workflow — OEM/ODM options available. Talk to our team OEM ODM

Rectangular wing-knob cam lock for one-hand operation on managed cabinets. NFC phone tap unlocks — zero batteries in the lock body, zero key inventory. Built for retrofit projects. Home / NFC Cam Lock / KR-NFC-CL3515 / Wing Knob NFC Keyless Cam Lock KR-NFC-CL3515 Characteristics Protruding body preferred for easier handling Small lever-style rotary switch operation Projects requiring consistent appearance Specifications Material : ABS Size : 153*40*51.45 mm Door thickness : ≤22 mm Surface treatment : Silver Spray Coating Customization : Structure • Dimensions • Appearance Operating environment : -25°C~+65°C/10%~90%RH Unlock method : Mobile phone Reverse Power&NFC APP Applications : Wooden Locker,Metal Locker, etc. Dimension line drawing Similar products KR-NFC-CL5126 Through the EU CE, ROHS certification and FCC certification KR-NFC-CL75 Through the EU CE, ROHS certification and FCC certification

Replace mechanical and battery-powered padlocks with smartphone NFC. KENRONE NFC padlocks cover disc, shackle, and heavy-duty models — no batteries inside, no keys to copy, IP65 sealed for outdoor sites. Built for fences, containers, warehouses, and distributed lock points. Battery-Free NFC Smart Padlock factory Battery-Free NFC Smart Padlock for Commercial Keyless Locking A battery-free smart padlock powered by smartphone NFC, designed for outdoor assets, distributed lock points, and commercial access management. No built-in battery in the padlock Smartphone NFC unlocking Suitable for outdoor storage lock and distributed assets Contact us Home / NFC Padlock / Choose the Right NFC Padlock Type for Your Application Standard Shackle Padlock Discus Padlock Disc Storage Unit Padlock Why are mechanical padlocks and battery-powered padlocks difficult to manage? Common Problems with Traditional Padlocks Too many mechanical keys to distribute, collect, and store One lost key may lead to lock replacement or access reorganization Multiple outdoor locking points increase on-site maintenance work Battery-powered smart padlocks add battery maintenance to every lock No unlock records, making it harder to trace access issues Temporary access for staff or contractors is often difficult to manage Turn Individual Padlocks into a Managed Locking System Explore NFC Battery-Free Lock System User authorization Tailored access permissions for different users. Temporary access Ideal for maintenance crews and contractors. Unlock records Track who accessed which lock and when. Multi-lock management Centralized management of multiple padlocks. Permission updates Easily update permissions as your team changes. Built for Outdoor and Commercial Locking Points Engineered for outdoor assets, utility infrastructure, and multi-site commercial operations — KENRONE NFC padlocks eliminate both the hassle of key management and the maintenance burden of battery-powered smart locks. Outdoor Cabinets Telecom, network, and electrical cabinets exposed to weather and tampering. Utility Boxes Water, gas, and power meter housings requiring auditable third-party access. Storage Yards Container gates and perimeter locks where physical key handover slows operations. Equipment Enclosures Industrial control panels and machine guards — keyless access for plant teams. Distributed Service Points Field assets accessed by mobile crews, contractors, and rotating personnel. Padlock Structure Designed for Commercial Reliability Lock shackle Hardened alloy steel — cut-resistant and weatherproof. Lock body Sealed zinc-alloy housing rated IP65 against dust and rain. NFC interaction area Authorized phones power and unlock the padlock via NFC — no battery inside. A Simple Workflow for Users and Administrators For Administrators Add users Assign padlock access Adjust permissions View unlock logs For Users Open the App Tap the phone to the NFC padlock Unlock with granted permission Complete the task Where NFC Battery-Free Padlocks Fit Self-storage units Utility boxes Industrial gates or enclosures Tool / maintenance boxes Mechanical, Battery-Powered, or NFC Battery-Free Padlock? Every padlock solves one problem — and creates another. Mechanical padlocks are simple, but keys get lost, copied, or walk out the door with former staff. Battery-powered smart electronic padlock add digital access, but every unit becomes another battery to replace in the field. KENRONE NFC padlocks remove both. Unlock by phone tap. Manage permissions from the cloud. Zero batteries inside the lock — ever. Comparison Term Mechanical Padlock Battery-Powered Smart Padlock NFC Battery-Free Padlock Distributed outdoor use Simple, but hard to manage Functional, but battery adds workload Suitable for low-maintenance digital management Multi-user management Weak Depends Better suited Unlocking Key App / code / fingerprint Smartphone NFC Built-in battery No Yes No Key management High Lower Lower Battery maintenance None Required No lock-body battery Access records No Depends Supported by system Looking for a battery-free NFC padlock for outdoor or commercial locking points? Contact KENRONE to discuss your application, access workflow, lock format, and project requirements. Request a Project Discussion News & Blog Related Resources More NFC Battery-free Smart Lock Products NFC Cam Lock NFC Storage unit Cylinder Lock NFC Euro Cylinder Lock NFC Key Box NFC Bike Lock NFC Storage Padlock

Explore KENRONE NFC smart bike cable lock powered by smartphone NFC with no charging required. It offers keyless bike locking in a flexible cable format for everyday bicycle use. NFC Smart Bike Cable Lock - No Charging Required Your phone is the key. No lock battery, no physical keys, no codes — just the app you already have on the device you already carry. Open the app, tap the lock — the latch releases, you slide the cable out by hand. Braided steel cable wraps frame, wheel, and rack in one pass. Built for daily commutes, campus, office, and short stops. ORDER A SAMPLE Home / NFC Bike Lock / Honest about what a cable lock is — and what it does well. A cable lock isn't a hardened U-lock, and we're not going to pretend otherwise. What this lock is built for is everyday parking: the bike rack outside the café, the office bike room, the spot beside the lecture hall. For those situations, security means three things — a steel cable thick enough to stop hand tools, a hardened body that doesn't pop with a tap, and a digital key that can't be picked or copied at a hardware store. 01 — Cable Braided steel core Multi-strand steel inside a PVC jacket. Resists wire cutters and casual tampering at the level a cable lock can — and protects the frame finish. 02 — Body Hardened lock body Zinc-alloy housing with a hardened steel locking pin. Stands up to pulling, prying, and impact at typical opportunistic theft attempts. 03 — Key Copy-proof digital key Pairs with authorized phones through encrypted NFC. No physical key to copy at a kiosk. No combination to shoulder-surf at the rack. Less to carry. Less to charge. Less to forget. Locks fail people in small, annoying ways. You forget the key. You can't remember which combination you set last summer. The Bluetooth lock you bought a year ago is dead in the rack because you haven't ridden the bike in a month. Your phone is the key. As long as you have it on you, the lock works. This lock removes the parts that usually go wrong: No keys to lose, copy, or fish out of a backpack No combinations to remember when you haven't ridden for a while No lock battery to charge before you can leave the house An obvious question “ But isn't a key faster ? ” For the moment at the rack, yes — turning a key beats opening an app by a few seconds. The difference shows up everywhere else: the key you forgot at home, the spare you lost last month, the one your roommate borrowed and didn't put back, the cut-and-replace fee when you can't find any of them. NFC trades two seconds at the rack for never thinking about keys the rest of the time. The difference between a 600 mAh problem and not having one. Most smart bike locks run on an internal battery, typically around 600 mAh. It charges over USB-C every few weeks — more often in cold weather. Forget once, and you're standing next to your own bike with a dead lock. This lock works differently. The lock body has no battery inside. When you tap an authorized phone against it through the app, the phone's NFC field releases the locking latch — and that's the only thing electricity does here. You pull the cable out by hand. To lock up, you push the cable back in until it clicks. Mechanical, like any cable lock you've used before. Because the electronics only run for the fraction of a second it takes to release a latch, there's no battery to keep alive between rides: The lock that sat in the garage all winter releases on the first ride of spring No USB-C port to corrode after rain, dust, or road salt No lithium battery to degrade after two seasons of partial-charge cycles One less thing on the charging shelf at home How it works Four steps from rack to road Step 01 Open the app. Pull out your phone, unlock it, open the lock app. Step 02 Tap the lock. Hold the phone against the NFC zone on the lock body. The app authenticates, the latch releases inside. Step 03 Slide the cable out. Pull the cable end free by hand. The lock is open. Step 04 Ride. That's the whole flow. Total time: around five seconds once the app is open. To lock up again Push the cable end back in until it clicks. The latch engages mechanically. No phone, no app, no tap needed to lock. Even with a dead phone at the rack, you can still secure the bike. The app verifies your identity before the latch releases. Unlike contactless payment, this lock doesn't trigger from a locked-screen background tap — opening the app is a deliberate authorization step. One cable, several ways to lock up. The cable bends where a U-lock can't. Loop it through the frame and a fat lamppost. Run it through both wheels and a thin railing. Wrap it around a tree at a trailhead where the rack stops being a rack. The cable does what the spot you actually parked at will let it do. Frame + rack Wrap through the rear triangle and around a standard bike rack. Frame + wheel + post Single pass secures the bike and a removable front wheel together. Awkward fixtures Fits trees, signposts, fence rails, and irregular shapes a rigid shackle can't reach. Two bikes, one lock Long enough to chain a partner's frame to yours at the same rack. Cable length: 100 cm — long enough for two bikes when you need it. Keyed, combination, battery, or NFC? A side-by-side against the three other formats this product competes with on the shelf. Comparison Keyed Cable Lock Combination Cable Lock Battery Smart Bike Lock NFC Smart Cable Bike Lock How you unlock Physical key 4–5 digit code App / Bluetooth Phone NFC tap Carry a key? Yes No No No Remember a code? No Yes No No Charge the lock? No No Yes, every few weeks Never Works after months unused? Yes Yes Often no Yes Replace lost access Cut and replace lock Reset code App reset / master key Re-pair via app Best for Basic lock-up Keyless basics Connected features Daily keyless lock-up, no battery hassle Fingerprint locks belong in the same column as battery smart locks — same charging cycle, same problem when the battery goes flat. U-locks and chain locks still win on raw security for overnight street parking in high-theft cities. This lock is for the rest of life: commute, campus, office, café stops. Where it earns its place on the frame Use case / 01 Daily commute Racks at the office, station, café, gym. The everyday workhorse. Use case / 02 Campus parking Students moving between buildings several times a day. Use case / 03 Shared and fleet bikes Rotate riders by re-pairing in the app — no key handover. Use case / 04 Off-season storage Sits in a pannier or garage for months without losing charge. Use case / 05 Light vehicles Scooters, kick scooters, folding bikes — anywhere a bike rack works. Use case / 06 Secondary locking Pairs with a U-lock for the wheel, seatpost, or accessories. For overnight street parking in high-theft areas, pair this with a hardened U-lock or chain. That's true of any cable lock on the market. Product details Contact us for more sizes and customization needs Spec sheet Item Parameters Certifications CE / FCC / RoHS Charging requirement None Color / model Black Net weight 665 g Operating temperature −20 °C to 65 °C Weather suitability IP65 — rain and dust resistant for outdoor use App support iOS/ Android Lock body battery None NFC unlocking Smartphone NFC (iOS and Android) Lock body material Zinc-alloy housing, hardened steel locking pin Cable material Multi-strand braided steel core, PVC outer jacket Cable diameter 11 mm OEM and ODM programs for brands, retailers, and distributors We manufacture this NFC cable lock for retail brands, bike-shop chains, fleet operators, and corporate channels. Standard SKUs ship from stock for sampling; custom programs are quoted against your spec. What you can customize Logo engraving on the lock body Retail packaging — color box, blister, brown box Branded app skin and account flow Color, cable length, and diameter within tested ranges Master account and fleet management for shared-bike use Sourcing this for a retail or fleet program? REQUEST A QUOTE Frequently asked questions FAQ about battery-free NFC cable lock Does this NFC bike lock need charging? No. The lock body has no internal battery. Each unlock is powered by your phone's NFC field, so there's nothing to charge or replace. A lock that's sat in the garage for six months opens the same way as one used yesterday. How does the phone actually power the lock? NFC (Near-Field Communication) is the same short-range wireless tech used for contactless payments. When the phone is held against the lock, it transmits both the unlock command and a small burst of power — enough to release the mechanism for the second or two it takes to open. No internet connection needed. Is this a GPS bike lock? No. This is a lock, not a tracker. It doesn't report location, send alerts, or contain cellular hardware. If GPS tracking is a hard requirement for your category, this isn't the product for it. Is the cable made of steel? Yes. A multi-strand braided steel core inside a PVC outer jacket. The PVC keeps moisture out and stops the cable from scratching the bike's paint. Exact diameter is in the product details table. Can it be used for scooters, e-bikes, or motorcycles? It works on scooters, kick scooters, and folding bikes that share bike-rack parking. For motorcycles and high-value e-bikes parked on the street, a cable lock — this one or any other — is not enough on its own. Pair it with a hardened U-lock or chain as the primary lock. Is it a high-security primary bike lock? No, and we don't position it that way. No cable lock on the market — battery, NFC, $20 or $200 — passes top-tier independent ratings like Sold Secure Gold or Diamond. Those certifications go to U-locks and chains. This lock is built for daily parking and short stops, where keyless speed matters more than resisting an angle grinder. For overnight street parking in a high-theft area, pair it with a hardened U-lock. What happens if I lose my phone? Lock access is tied to your account in the app, not the phone hardware. Log in on a new phone and pair the lock again. Lost or stolen phones can be revoked from the app on any device you've authorized. Does it work with both iPhone and Android? Yes. Both platforms support the NFC functionality this lock uses. Specific OS versions are in the product details. Is the app required to lock the bike? Only for unlocking. Locking is mechanical — push the cable end back into the body until it clicks. Even with a dead phone at the rack, you can still lock the bike. You just need some phone charge before you head home. What if my phone dies before I get back to the bike? The most common worry. Honest answer: any NFC unlock — phone-as-hotel-key, transit pass, this lock — needs the phone to have enough charge to power the NFC chip. That amount is small but not zero. A pocket power bank covers it, which most riders are already carrying. More NFC Battery-free Smart Lock Products Explore NFC Battery-Free Lock System NFC Cam Lock NFC Padlock NFC Euro Cylinder Lock NFC Key Box NFC Storage Padlock

Upgrade an entire floor of mechanical Euro cylinders to NFC in one afternoon. No wiring, no battery maintenance, no door cutting. AES-256 encrypted, IP65 sealed. Built for offices, hotels, and multi-tenant facilities. Battery-Free NFC Smart Euro Cylinder Lock for Keyless Upgrades Battery-Free NFC Smart Lock Cylinder Factory No batteries. No wiring. No mechanical keys. Just a phone tap to unlock — engineered to retrofit standard Euro cylinder cutouts. Replace any mechanical Euro cylinder lock with smartphone NFC access — no rewiring, no door modification, no battery to maintain inside the lock body. The KENRONE NFC Euro cylinder is engineered as a true drop-in upgrade for commercial doors, server cabinets, and access-controlled rooms across hotels, offices, and managed properties. Request a Sample Home / NFC Euro Cylinder Lock / Why NFC Battery-Free Beats Standard Electronic Cylinder Locks Most "electronic cylinder locks" trade your mechanical key for a different headache — dead batteries. KENRONE's battery-free design takes a different path: the smartphone provides both authentication and power, so the lock itself never needs a battery change. Battery-Powered Electronic Cylinder The Problem Every 6-12 months, every lock needs a battery swap. Across 50 doors, that's 50 maintenance calls per year. Battery anxiety Wired Electronic Cylinder Lock The Problem Requires door drilling, cable routing, and electrician installation — making retrofit nearly impossible. Installation chaos NFC Battery-Free Cylinder Lock The Problem Drops into standard Euro cylinder cutouts in 5 minutes. Powered by the user's phone. Zero batteries inside. Truly maintenance-free Made for Euro Cylinder Replacement and Smart Retrofit Designed to Retrofit, Not Replace KENRONE NFC Euro cylinders are built to drop into the standard DIN 18252 / EN 1303 Euro profile cutout — the same opening already on millions of commercial doors worldwide. No door modification. No frame drilling. No specialized installer required. A facilities team can swap an entire floor of mechanical cylinders to NFC in a single afternoon. Remove old mechanical cylinder Slide in KENRONE NFC cylinder Tap phone to activate — done Keyless Is More Than "No Key" — It's a New Way to Manage Doors Going keyless with most smart Euro cylinders just trades one inconvenience for another — batteries to swap, and Wi-Fi connections that drop at the worst moments. NFC battery-free cylinders deliver true keyless management: phone-based authentication, role-based permissions, real-time access logs, and instant revocation when staff change. The same hardware scales from a single door to an entire facility. Explore NFC Battery-Free Lock System No physical keys to lose, copy, or rekey No shared codes to leak between users No wiring to install or maintain No batteries inside the lock Built for Doors That See Real Traffic. KENRONE NFC Euro cylinders are engineered for commercial environments where access is dynamic — staff rotate, contractors come and go, and key management quickly becomes unmanageable. Office Buildings Tenant doors, meeting rooms, executive offices Hotels & Short-Term Rentals Guest rooms, staff-only areas, back-of-house storage Schools & Universities Classrooms, labs, dormitory shared spaces High Security Euro Cylinder Lock Security That Doesn't Compromise A keyless lock is only as strong as the cylinder it replaces. KENRONE NFC Euro cylinders meet European commercial-grade security standards — solid brass body, fully sealed electronic core, and AES-256 encrypted authentication. No keyway, no pins, nothing for a pick or drill to attack. Security Features Hardened anti-drill pins Anti-pick design Hardened steel construction IP65 weather-resistant rating AES-256 encrypted communication One-time dynamic credentials No fixed passwords to leak Instant remote access revocation Mechanical, Battery-Powered, or NFC Battery-Free? Three common upgrades for Euro cylinder doors — three very different maintenance realities. Mechanical cylinders cost the least up front, but every staff change means rekeying every door. Battery-powered smart cylinders eliminate keys, but introduce a new headache: dead batteries that lock people out at the worst possible moment. NFC battery-free cylinders solve both — no keys to rekey, no batteries to swap. Comparison Mechanical Euro Cylinder Battery-Powered Smart Cylinder NFC Battery-Free Cylinder Unlocking Method Mechanical Key App / Code / Fingerprint Smartphone NFC Tap Built-in Battery None Required (6-12 month replacement) None — powered by phone Installation Standard cylinder swap Often requires wiring or batteries Drop-in Euro profile retrofit Key Management High effort, physical keys Lower, depends on app Centralized cloud control Access Records None Depends on system Full audit trail via cloud Multi-User Management Weak Depends Built for role-based access Best For Simple residential doors Single high-end installations Commercial retrofits at scale Size and Compatibility Matter Before Replacement Before selecting a replacement cylinder, it is important to confirm the required size and door compatibility. Length, internal and external dimensions, and the existing installation format all affect whether the new cylinder will fit properly and work as expected. Contact us for more sizes and customization needs Looking for a battery-free NFC Euro cylinder for keyless upgrades or retrofit locking projects? Contact KENRONE to discuss your door type and project requirements. Request a Project Discussion News & Blog Related Resources More NFC Battery-free Smart Lock Products NFC Cam Lock NFC Padlock NFC Storage unit Cylinder Lock NFC Key Box NFC Bike Lock NFC Storage Padlock Built by a Lock Maker, Not a Tech Startup Since 2002, KENRONE has built mechanical, electronic, and now battery-free NFC locks for commercial projects in 100+ countries. We don't just assemble locks — we engineer them, from circuit board to cam mechanism, all under one roof. About us From mechanical locks in 2002 to NFC battery-free cam locks today — we've evolved with every shift in the industry. 23 Years in Locking We build the complete NFC ecosystem — from battery-free hardware to cloud management — engineered to work together. Systems, Not Just Locks Complete control from circuit design to final QC — no third-party assembly, no surprise quality drift. Fully In-House Manufacturing Tested in the conditions our locks will actually face — extreme temperatures, heavy use, outdoor exposure, contractor rotation. Built for the Field, Not the Lab

We provides ODM and OEM support for NFC battery-free locks, including custom structures, applications, branding, and project-based lock solutions. OEM & ODM NFC Battery-Free Locks Turn your NFC smart locking idea into a production-ready product. KENRONE supports brands, distributors, integrators, and project owners with custom NFC battery-free lock hardware, app connection options, packaging, inspection, certification support, and global delivery. Request OEM Quote View Project Flow Built for project-based supply Use one NFC access platform across cam locks, padlocks, Euro cylinders, storage cylinders, key boxes, bike locks, and custom formats. Factory OEM and ODM for standard or custom lock bodies Logo, color, material, credential, packaging, and app-flow options Sample-first project flow before batch production CE, FCC, RoHS, and target-market documentation support Project Flow OEM/ODM process with practical time checkpoints. Every project starts with a clear RFQ, sample confirmation, and production feasibility review. Final timing depends on lock format, tooling, firmware, packaging, test scope, and certification requirements. 01 Submit Requirements Share product type, quantity, application, target market, access workflow, and customization request. RFQ day 0 02 Sample Confirmation KENRONE recommends the closest standard SKU, prepares sample units, and confirms core dimensions and unlock flow. 2-4 weeks 03 Custom Development Logo, housing, material, firmware, credential, packaging, or app connection details are developed against the approved spec. By scope 04 Pilot Production Small-batch production validates tooling, assembly, inspection points, packaging, and operating instructions. 2-3 weeks 05 Quality Inspection Function, appearance, packaging, quantity, and project-specific test items are checked before shipment. Before ship 06 Delivery & Logistics Goods are packed for export and delivered by courier, air freight, sea freight, or customer-appointed forwarder. By route Customizable Items Configure the product surface, access method, and customer experience. Use light customization for faster launch, or deeper ODM development when your project needs a special structure, credential flow, app skin, or accessory package. Branding Logo & Brand Identity Laser engraving, printed logo, product label, user manual, and brand-aligned packaging artwork. Industrial Design Housing Color & Material Exterior color, surface treatment, shell material, lock-body finish, and accessory matching. Access Workflow Credential Type NFC phone tap, app account flow or system integration options. Retail & Project Supply Packaging Design Color box, blister pack, brown box, accessory kit, barcode label, installation card, and export carton design. Customization can be applied across NFC cam locks, padlocks, cylinders, storage locks, cable locks, key boxes, and project-specific hardware. MOQ & Lead Time Reference quantities and delivery timing for planning. The figures below are planning references. KENRONE can confirm the final MOQ, unit cost, tooling cost, packaging cost, and lead time after reviewing your RFQ and selected lock format. Sample Order For fit testing, app workflow review, and internal approval before customization. 1-5 pcs Standard SKU samples available by project Batch Order For OEM supply using standard hardware with logo, packaging, or light configuration changes. 100+ pcs Common starting point for production quotation ODM Project For housing changes, special structure, firmware adjustment, app flow, or new accessories. By spec Tooling and validation scope affect MOQ Project Type Typical Scope Sample Lead Time Mass Production Lead Time Notes Standard OEM Existing lock type, logo, label, carton mark 1-2 weeks when stock is available 3-5 weeks after order confirmation Fastest path for distributors and project pilots. Brand Package OEM Logo, manual, retail box, accessory kit 2-4 weeks after artwork confirmation 4-6 weeks after packaging approval Packaging proof and barcode/label rules should be confirmed early. Functional ODM App flow, credential rules, firmware or structure changes 4-8+ weeks depending on development 6-10+ weeks after validation Timeline depends on R&D, tooling, test plan, and target market. Certification Support Documents for market entry and project approval. KENRONE can provide or support corresponding certification documents according to target markets, product type, and customer compliance requirements. CE European market compliance support for eligible products. FCC US market radio and electronic product documentation support. RoHS Materials safety documentation for regulated markets. ISO Factory and quality system documentation for supplier review. RFQ Form Send the information KENRONE needs to quote your OEM/ODM project. Clear requirements help reduce back-and-forth and make sample, tooling, production, certification, and logistics estimates more accurate. Talk to the factory Email sales@kenrone.com Tel / WhatsApp +86 153 6019 3224 Headquarters Build11, Liandong U Valley, Zhenye Road, Sanhe Street, Huiyang District, Huizhou, Guangdong, China Contact Us * Name * Email * Phone * What are you looking for ? - Select - Message Submit

Andy Guo — Head of R&D at KENRONE Andy Guo Head of R&D at KENRONE Andy Guo has been with KENRONE since the company was founded in 2002. With more than 30 years in the security lock industry, he leads KENRONE's entire R&D team and sets the overall direction for its NFC battery-free locks, coordinating the electronics, firmware, and structural workstreams to safeguard product quality and design. Drawing on deep experience across mechanical locks, electrically controlled locks, smart locks, and smart security boxes, he guides new products from concept and prototype validation through to mass production. He holds a bachelor's degree. Company: KENRONE — NFC Battery-Free Lock Manufacturer R&D Team: KENRONE Engineering Team

Retrofit your existing locker banks with battery-free NFC locks. Assigned or shared mode, no wiring, no in-lock batteries, every authorized unlock recorded. Lock upgrade, not a full cabinet system. Smart Locker Systems — Battery-Free NFC Locks for Existing Locker Banks Upgrade assigned and shared lockers with smartphone NFC access — without wiring, in-lock batteries, or replacing the locker cabinet. Choose assigned mode for one-person lockers, or shared mode for rotating facility use. A lock upgrade for the lockers you already own — KENRONE supplies the NFC access lock and platform, not the cabinet. It retrofits standard locker hardware; it is not a parcel-locker, vending, or full smart-cabinet system. Every authorized NFC unlock is recorded with user, time, and locker ID, depending on deployment configuration. Find Your Locker Solution Talk to Our Lock Engineers 0 battery No power source to fail None Wiring Keep existing Locker Home > Solutions > Locker Locking Solution > The Platform One NFC locker platform for how your lockers are actually used. A locker is not one problem — and one of the simplest smart locker solutions to retrofit: KENRONE supplies the NFC access lock and platform, not the cabinet. It retrofits standard locker hardware; it is not a parcel-locker, vending, or full smart-cabinet system. Long-term occupancy One person, one locker. An employee's personal locker, a staff or faculty locker, a tool locker. The question: who owns this compartment, and how do I add or remove them cleanly? Rotating occupancy Many people, in turn. A gym bank where members come and go, a pool, a visitor row, a hot-desk wall. The question: how do I hand a free compartment to whoever needs it now, and reclaim it after? The old answer to both was the same — a coin, a key, or a member's own padlock. KENRONE replaces that with one battery-free NFC platform where the smartphone is the credential and the power source. The lock stays passive, sealed, and battery-free; access is assigned or released in the app, and every authorized unlock is recorded. How the passive NFC lock works → Choose Your Access Mode Choose your locker access mode. That single choice decides the lock workflow. Pick the one that matches how the compartment is occupied. Assigned / Private Locker ONE COMPARTMENT · ONE NAMED · PERSON · LONG TERM Employee lockers . staff & faculty lockers . personal tool lockers . administrative storage. SOLVES Members' own padlocks, lost keys, re-keying on turnover,"whose locker is this." Explore assigned lockers → Shared / Rotating Locker ONE COMPARTMENT · MANY USERS · RELEASED AFTER USE Gym & leisure · pools & spas · visitor lockers · hot-desk offices. SOLVES Coin returns, key deposits, padlock cut-offs, no record of who used it. Explore shared lockers → Compare Padlock vs coin/key vs battery electronic vs NFC battery-free lock. KENRONE locker locks are built for facilities that want keyless access and a usage record without adding batteries to maintain. Locker lock types compared Feature Member's padlock Coin / key lock Battery electronic NFC battery-free Wiring required No No Sometimes No Credential User's own Coin or key Card / app / code Smartphone NFC tap Usage / unlock record None None Yes, if powered Authorized unlocks recorded Release for next user — Manual reset App-based App-based Assign to one named user No Re-key App-based App-based Maintenance per locker User's problem Key/coin logistics Battery service Lower maintenance In-lock battery None None Required None Who supplies the lock The user Facility Facility Facility More Applications More locker environments. The same platform fits many locker environments. If yours isn't listed, talk to us. Spa & wellness changing rooms Hot-desk / flexible offices Visitor & contractor lockers Healthcare back-of-house Retail staff lockers Faculty & staff lockers What it does not fit : because the smartphone powers and opens the lock, it is not suitable for lockers whose purpose is to store the phone itself — device-charging lockers, exam phone-storage, or 1:1 student device programs. Those need a card-based or powered system. KENRONE locker locks are for coats, bags, shoes, tools, and documents — not the credential device. Why KENRONE Why KENRONE. 01 Factory-direct. 20+ years of lock manufacturing in Huizhou — pricing and lead times direct from the source. 02 CE, FCC, and RoHS certified. Certified hardware for European and North American markets. 03 MOQ per project From pilot quantities to full rollouts — set per project, not a fixed wall. 04 OEM / ODM ready Built for cabinet and locker manufacturers integrating our lock into their own product. 05 Documented API & SDK An open integration platform for your management software. 06 English documentation Complete English technical docs for international B2B buyers. Talk to Us Tell us how your lockers are used. We'll recommend the right lock format, access mode, and next step. Contact Us * Name * Email * Phone * What are you looking for ? - Select - Message Submit