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Wang Lin — Chief Electronics Engineer at KENRON Wang Lin Chief Electronics Engineer at KENRONE Wang Lin joined KENRONE in 2016 and serves as Chief Electronics Engineer. He is responsible for the electronic systems, embedded firmware, and control architecture of KENRONE's battery-free NFC locks. He leads core electronics development and solves the critical challenges in power consumption, communication, control, and stability that determine how a passive NFC lock actually performs. He holds a bachelor's degree. Company: KENRONE — NFC Battery-Free Lock Manufacturer R&D Team: KENRONE Engineering Team

Flush recessed cam lock for tight cabinet faces and stackable enclosures. Smartphone NFC unlocks in under a second — no batteries inside, no protruding knob to snag. Drop-in retrofit. Home / NFC Cam Lock / KR-NFC-CL75 / Thumb Turn NFC Keyless Cam Lock KR-NFC-CL75 Characteristics Recessed / low-profile front preferred Reduced snagging and accidental knock risk Cleaner look with an integrated (in-body) rotary switch Specifications Material : ABS+20%PC Size : 109*75*29.4mm Door thickness : ≤7 mm 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-CL3515 Through the EU CE, ROHS certification and FCC certification KR-NFC-CL5126 Through the EU CE, ROHS certification and FCC certification

Download and install the KENRONE NFC Battery-Free lock app. Learn how to set up NFC, log in, and start using your NFC battery-free lock. KENRONE Lock Management Software Choose the right KENRONE app for phone-based unlocking, lock setup, user authorization, and project management. Download APP Contact Support Four app downloads, two management modes KENRONE provides standalone and online management apps. Each mode has an iOS version and an Android version, so customers can choose by both project type and phone system. Standalone Mode Standalone NFC Lock App For single-user or small-site unlocking where simple setup and direct phone-to-lock operation matter most. Open the lock by tapping an NFC-enabled phone near the lock body. Suitable for samples, small cabinets, tool boxes, padlocks, and quick demonstrations. Lower setup complexity when cloud management is not required. Available as standalone iOS and standalone Android downloads. Choose iOS / Android View Steps Online Mode Online Management App For commercial projects where admins need to manage locks, users, permissions, and access records. Manage multiple locks, users, and authorization rules from one account. Designed for lockers, logistics points, cabinets, self-storage, and distributed assets. Supports project workflows that need assigned users and access record review. Available as online management iOS and online management Android downloads. Choose iOS / Android Ask for Account Download Standalone IOS KENRONE Pure-IOS iOS Download Standalone Android KENRONE Pure-Android Android Download Online iOS KENRONE Net-IOS iOS Download Online Android KENRONE Net-Android Android Download Quick comparison Use this table to help customers choose the correct management mode before selecting iOS or Android. Item Standalone Mode Online Management Mode Best for Single lock, sample testing, simple local unlocking, small cabinet projects. Multi-lock projects, customer accounts, operator control, access record management. Available platforms Standalone iOS app and standalone Android app. Online management iOS app and online management Android app. Setup Choose iOS or Android, install app, turn on NFC, add or select lock, tap phone to unlock. Choose iOS or Android, install app, log in with an assigned account, bind locks, assign users, manage access. Management Local operation focused on unlocking and simple lock use. Project operation focused on users, locks, groups, records, and support control. Recommended CTA Download the standalone iOS or Android version and follow the installation steps. Contact KENRONE to confirm account setup, then download the iOS or Android online version. Before You Start Make sure your phone supports NFC. Turn on NFC in phone settings. Keep the phone close to the lock during unlocking. Use the account provided by KENRONE or your system admin for the online iOS or Android version. Installation Steps 01 Download the app Use the correct download link or QR code for one of the four versions: standalone iOS, standalone Android, online iOS, or online Android. 02 Install and open Allow the required phone permissions and keep NFC enabled during setup. 03 Log in or start local use The online iOS and Android apps require an account. The standalone iOS and Android apps can be used for direct local operation. 04 Add or select the lock Bind the lock, select the target lock, or follow your administrator's project instructions. 05 Tap the phone near the lock Place the phone close to the NFC sensing position and wait for the lock to respond. Need Help? Contact KENRONE Contact us

Battery-free NFC disc lock for storage units — phone-tap to authenticate then turn to open, no batteries, IP65 sealed, bulk pricing for operators NFC Disc Lock for Storage Units — Battery-Free Padlock The KENRONE NFC disc lock for storage units replaces the padlock on your external-hasp, drive-up, and container doors with a battery-free, phone-tap version Tap an NFC phone to authenticate, then turn the knob to release the shrouded shackle — there is no battery inside the lock to drain or replace. It brings the same keyless access and cloud management as our cylinder line to the doors a recessed cylinder cannot fit. If you have been looking for a smarter storage unit disc lock, this is the battery-free upgrade. Zero battery in the lock — powered by the phone's NFC field, nothing to charge or swap Shrouded hardened shackle — a discus body leaves little for bolt cutters to grip IP65 sealed — rated for rain, dust, and freeze on outdoor and drive-up doors Phone is the key — no tubular key to snap, no key inventory to manage Request a Sample View Specifications Home / NFC Padlock / NFC Disc Lock for Storage Units / How the Battery-Free NFC Disc Lock Works There is no battery inside the lock. The phone's NFC field supplies the power at the moment of the tap, the same principle a contactless transit card uses. A unit can sit closed for a year and still open on the first tap. Tap — hold your NFC phone to the lock; the field powers it and checks your credential Turn — once authenticated, rotate the knob to draw back the hardened shackle Done — no key, no battery, no dead-lock lockout on a dormant unit Explore NFC Battery-Free Lock System Built for Outdoor and Drive-Up Storage Drive-up and outdoor units punish a lock: rain, grit, temperature swings, and constant handling. This disc lock is sealed to IP65 and rated from −25°C to +65°C, so winter freeze and summer heat do not stop the tap. Because the shackle is hardened alloy steel inside a discus body, the usual padlock attack — a bolt cutter on an exposed shackle — has little to grab. Disc Lock vs Padlock vs Smart Lock Here is how the KENRONE NFC disc lock compares with the padlocks storage units use today. Comparison Mechanical disc padlock Bluetooth smart padlock KENRONE NFC disc lock Unlock method Key App + Bluetooth pairing Phone NFC tap, then turn Battery in the lock None Internal battery None Key-loss risk High None None Access logging None App Cloud log Weather sealing Varies Varies IP65 Cut resistance Shrouded shackle Varies Shrouded hardened shackle Multi-tenant management Manual App Cloud access control Different door, same technology. If your units use recessed cylinders instead of hasps, the NFC self-storage cylinder lock delivers the same battery-free, phone-tap access. Built for How Facilities and Tenants Actually Operate For Facility Operators Fit outdoor, drive-up, and hasp units with NFC disc locks and manage them alongside your cylinders. Tenants get a digital key at move-in; you get remote credential control, access logs, and no key inventory to track. Request Facility Pricing For Tenants (Long-Term Renters) Bring your own smart lock instead of the facility markup. Tap to authenticate, turn to open, and see every access on your phone — with nothing to recharge and no key to lose. Check Compatibility Specifications Mechanical Smart Model: KR-NFC-PL96 Authentication: NFC (ISO 14443-A) Body: zinc alloy Encryption: AES-256 dynamic credentials Shackle: Stainless steel lock beam, Ø10 mm Power source: passive (smartphone NFC field) Body size: Ø70 / H=96 mm,B= 55mm Battery: none inside the lock Ingress protection: IP65 Compatible devices: NFC-enabled iOS & Android Operating temp: −25°C to +65°C Unlock response: typically 0.5–2 seconds Humidity: 10–90% RH Access log: cloud-retained (retention configurable) Certifications: CE, FCC, RoHS Also suits: drive-up, containers, outdoor cabinets Dimension line drawing Customization and OEM Structure, dimensions, and appearance are all open to customization for project and OEM programs. If you need a different shackle length, body size, or finish for your facility or product line, we spec it with you. Explore OEM/ODM & API Where This Fits in a Full Self-Storage Access Control Solution A real facility is rarely one door type. The disc lock covers hasp, drive-up, and outdoor units while the cylinder covers indoor roll-ups — both managed from one platform. See how a full rollout works on our self-storage access control solution page. Self Storage Solution News & Blog Related Resources Frequently asked questions Will this disc lock fit my storage unit's hasp? It suits the external hasps used on drive-up units, containers, sheds, and outdoor doors. Send a photo of your hasp and door and we confirm fit before any order. Do I need an app to unlock it? You use the KENRONE app to hold your credential, then the phone's NFC field powers the lock at the tap and you turn the knob to open. Any NFC-enabled iPhone or mainstream Android phone works. Is a disc lock secure enough for outdoor storage? The discus body shrouds a hardened alloy-steel shackle, so the common bolt-cutter attack on an exposed shackle has little to grip. The lock is also sealed to IP65 for rain, dust, and freeze. What happens if my phone dies? NFC draws very little from the phone, so even a nearly-dead phone can usually still authenticate the tap. Can the operator revoke access remotely? Yes. An operator on the KENRONE cloud platform suspends a unit's credential, so that phone can no longer open the lock. How is this different from a DaVinci disc lock? A DaVinci disc lock is a release-code mechanical lock that a tenant opens with a QR or text code, mainly for vacant-unit and overlock automation. The KENRONE disc lock uses electronic NFC authentication with a per-entry access log and revocable credentials. See the full KENRONE vs DaVinci Lock comparison. Disc lock or cylinder lock — which should I choose? Use the disc lock for external-hasp, drive-up, and outdoor doors, and the cylinder lock for indoor roll-up doors with a recessed cutout. Many facilities run both. More NFC Battery-free Smart Lock Products NFC Cam Lock NFC Padlock NFC Euro Cylinder Lock NFC Key Box NFC Bike Lock NFC Storage Padlock Built by a Lock Maker, Not a Tech Startup KENRONE has been a lock manufacturer since 2002 and has focused on battery-free NFC locks since 2020, shipping mechanical, electronic, and NFC hardware to projects in 100+ countries. We engineer the whole lock — from circuit board to cam mechanism — under one roof. Request a project discussion → over two decades in locking Vertical lock specialist battery-free hardware and cloud management engineered to work together Systems, Not Just Locks from circuit design to final QC, no third-party assembly Fully In-House Manufacturing tested against extreme temperature, heavy use, and outdoor exposure Built for the Field, Not the Lab

Battery-free NFC locks for electrical cabinets and control panels. Authorized access, unlock records, drop-in retrofit, and CE/FCC/RoHS documentation. Electrical Cabinet & Panel Locks. Authorized Personnel Only , Every Authorized Unlock Recorded. Replace shared keys and unaccountable padlocks with NFC-based authorization. Restrict electrical cabinet access to qualified personnel — and capture a verified record of each authorized unlock event , at the cabinet, not on paper. Talk to Our Lock Engineers How NFC Locks Work 0 battery No power source to fail 1–2 s Tap-to-unlock time 100 % Access events recorded IP65 −20°C to 65°C Home > Solutions > Cabinet Locking Solution > Electrical Cabinet Locking > §01 The Real Question Electrical Cabinet Access Is a Safety Issue, Not a Convenience Issue Most cabinet access problems are about efficiency — finding keys, granting access, tracking who has what. Electrical cabinets are different. The question is not how to make access easier. It is who should be allowed near energized equipment in the first place. Electrical cabinet access is governed by both international standards — notably IEC 60364 for low-voltage installations and ISO 45001 for occupational health and safety — and regional electrical and OSH regulations that apply equivalent requirements under different statutes. Over 600 V — locked by default In the U.S., OSHA 29 CFR 1910.303 specifies that enclosures containing exposed live parts above 600 V must be kept locked unless under the continuous observation of a qualified person. 600 V or less — controlled access For installations at 600 V or less, OSHA treats controlled lock-and-key access as the standard means of designating a space as accessible only to qualified personnel. Equivalent provisions apply under EN 50110 and EN 60204 in Europe, HSE Electricity at Work Regulations 1989 in the UK, and regional electrical codes elsewhere (KEC in Korea, AS/NZS 3000 in Australia, SS 638 in Singapore, GSO standards across the GCC). The regulations describe what is supposed to happen . The implementation layer — who actually has access, and what record exists when they do — is where most facilities fall short. §02 The Mechanism How NFC Battery-Free Locks Work in Electrical Environments The lock has no internal battery. When an authorized smartphone is tapped against it, the phone's NFC field provides the small amount of power needed to verify credentials and release the lock — in one to two seconds. 01 No Battery to Fail With no internal power source to leak, drain, or fail in temperature extremes, the lock removes the single most common cause of smart-lock failure in industrial environments — heat, vibration, and dust included. 02 No Keys in Circulation Authorization lives in the app, not in a pocket. Granting, revoking, or limiting access takes seconds — not a trip to the locksmith. 03 Every Unlock Recorded Each access event captures the time, the authorized user, and the specific cabinet that was opened. Two app versions are available A cloud-connected version that syncs access records to a central administrator dashboard in real time, and a fully offline version where records stay on the user's phone and the administrator's device — for remote utility sites or environments where network independence matters. The phone becomes the credential and the power source at the same time. The lock stays passive, sealed, and ready. §03 What Actually Happens The Reality of Electrical Cabinet Access in the Field The regulations describe what should happen. Industry observation describes what often does. 01 Panels that should be locked are not Older commercial buildings, light industrial sites, and remote utility installations routinely run electrical panels that are unlocked, secured with weak shared keys, or padlocked with hardware nobody can account for. Security professionals recommend inventorying all panels and reassessing which require restricted access. 02 Procedures exist on paper, enforcement is weak In the U.S., OSHA's Lockout/Tagout standard (29 CFR 1910.147) has been on the Top 10 Most Cited Standards for over a decade. The drivers are well documented: missing energy-control procedures, inadequate training, skipped inspections. Equivalent enforcement gaps exist under different statutes — ISO 14118 / EN 1037 in machinery contexts, HSE in the UK, KOSHA in Korea, and equivalent OSH authorities elsewhere. Cabinet access enforcement sits in the same execution gap — written rules, no operational mechanism. 03 Keys are everywhere, accountability is nowhere When 50 cabinets span a multi-building facility, the typical approach is a master key held by maintenance, security, and facilities. No record exists of who opened what or when. When something goes wrong, no one can answer who was inside the cabinet last. 2,554 U.S. LOTO citations, FY2023 +17% Increase over prior year $20.7M In penalties, 1,368 inspections NFC battery-free locks address the cabinet-access layer of electrical safety — not LOTO itself, but the upstream questions of who is allowed near energized equipment, and what record exists when they are. §04 The Audit Gap Cabinet Access Records — The Documentation Layer LOTO Programs Don't Cover LOTO programs document the isolation event: which energy sources were locked out, by which qualified worker, with which personal padlock. Paper tags capture that step well — when the procedure is followed. The cabinet itself is a separate layer. 3 a.m. last Tuesday Who opened the panel? Between windows Who accessed the MCC section off-schedule? Before the fault Who was inside just before it occurred? Paper-based programs cannot answer these questions — and at most facilities, no one can. NFC battery-free cabinet locks supply this evidence layer: Every cabinet open and close event is tied to a named user Time of access is recorded automatically Identity is verified against the authorization list maintained by the safety administrator WHERE IT FITS When an OSHA investigator, insurance auditor, or internal safety review asks who accessed this cabinet and when, the answer exists — in a form that does not depend on paper logs or memory. WHERE IT DOES NOT These are not LOTO energy isolation devices. They do not replace personal padlocks on disconnects, breakers, or valves — both OSHA 29 CFR 1910.147 (U.S.) and ISO 14118 (international machinery safety) require each worker to maintain personal control of their own device. §05 Qualified Person, Enforced Restricting Electrical Access to Authorized Personnel Electrical safety regulations treat "qualified person" as a specific designation, not a generic title — training, demonstrated competence, and current authorization for specific equipment at specific voltage levels. The traditional way of enforcing this is training records and key distribution — both of which drift out of sync. Training records say one thing, key holders are another, and the people actually opening cabinets are a third group. NFC battery-free locks make the authorization list the operational system itself : Defined : Each user's access is set by cabinet, by voltage class, by time of day, or by project. Enforced : Without app authorization, the cabinet does not open. The rule is the lock. Revoked : When training expires, a qualification lapses, or a contractor's engagement ends, access is removed in the app. The cabinet is not touched. List and reality stay synchronized. TWO ASSIGNMENT PATTERNS MULTI-USER MODE Multiple authorized users can open the cabinet, with the administrator managing the access list. The default mode for routine maintenance access and shared-cabinet workflows. SINGLE-USER MODE The lock is bound to one named worker who holds the credential — a dedicated tool cabinet, a contractor's site cabinet during a fixed engagement, or a private records cabinet. A 1:1 lock-to-user assignment, not a LOTO personal-control device. The compliance binder and the cabinet finally tell the same story. §06 Drop-In Upgrade Drop-In Retrofit for Electrical Panel & Cabinet Locks Many commercial and light-industrial cabinets use standard 19mm and 22mm cam lock cutouts. NFC battery-free cam locks fit these cutouts directly. No drilling, no wiring, no cabinet replacement. STANDARD CUTOUTS — DIRECT FIT Main distribution & sub-distribution boards Tenant-restricted breaker panels PLC & automation control cabinets Switchgear access panels (low voltage) Indoor & semi-outdoor enclosures NON-STANDARD — CUSTOM INTERFACE For three-point latching systems (some MCC sections), proprietary handle locks (Eaton, Schneider, and similar), sealed outdoor NEMA 4X enclosures, or medium-voltage switchgear — alternative form factors and custom mechanical interfaces are available. Send us your enclosure model or a photo of the existing lock cutout, and we will advise on compatibility before specifying. Need a fit review? Send us your enclosure model, lock cutout photo, or panel-door hardware type. We will confirm whether a standard NFC cam lock, padlock, or custom interface is appropriate. Send Your Enclosure for Fit Review §07 Honest Operating Range and Environmental Limits We say what the locks are built for, and what they are not. Operating temperature: −20°C to 65°C — covering the great majority of indoor electrical environments and most outdoor enclosures in temperate climates. SUITABLE FOR Commercial buildings & light industrial facilities Indoor & semi-outdoor electrical cabinets Distribution panels in mechanical rooms & closets Remote utility cabinets in non-extreme climates NOT CURRENTLY RATED FOR Extreme cold below −20°C (Arctic, refrigerated rooms) High temperature above 65°C (foundry-adjacent) Hazardous-area classifications (Class I Div 1, ATEX) Medium- / high-voltage switchgear above 600 V NERC CIP-compliant critical-infrastructure sites Emergency-access note: NFC cam locks for cabinet retrofit do not include a mechanical override key. If first-responder or emergency mechanical entry without app credentials is required by your facility protocol, raise this during specification so we can recommend an alternative form factor or supplementary access method. For applications outside these ranges, talk to us before specifying — we can advise on suitability or refer to alternatives. §08 Engineering Rationale Why NFC Battery-Free Locks Are Safe Near Energized Equipment NFC battery-free locks are designed to live on the outside of an electrical cabinet, not inside it. Three engineering properties make this approach safe for the cabinet types covered above. 01 Electronics are external to the energized environment All components — NFC coil, integrated circuit, motor — sit on the cabinet door, outside the enclosure. They do not interface with, contact, or pass current to any energized component inside. The lock secures a door; it does not connect to the electrical system. 02 NFC field energy is too low to act as an ignition source NFC operates at 13.56 MHz with field power on the order of hundreds of milliwatts, present only during the 1–2 second unlock. As distributed near-field magnetic coupling, it produces no concentrated discharges or arcs. 03 No failure mode creates an electrical hazard inside the cabinet Whether the lock fails open, fails closed, or suffers electronic damage, no failure path causes arcing, short-circuit, or energy release inside the enclosure. The cabinet's own protections — dead front, breakers, internal LOTO devices — remain independently effective. NOTE ON HIGH-EMI ENVIRONMENTS Near large variable-frequency drives, arc-welding areas, or high-current busways, NFC operation may occasionally require a second tap as communication recovers from interference. The lock's electrical safety is unaffected ; only unlock reliability may degrade. We recommend on-site testing during specification for environments of this type. §09 Datasheet Specifications. The hardware. Documentation available on request, including datasheet PDF, installation guide, and API/SDK reference for integrators. NFC Battery-Free Cam Lock KR-NFC-CL Certifications CE · FCC · RoHS Integration API + SDK available Offline operation Yes (offline app version) Users per lock Not limited Phone support Android & iOS NFC Unlock time 1–2 seconds Operating temp −20°C to 65°C Body material Zinc alloy Body diameter 19mm / 22mm ↓ Datasheet (PDF) → NFC Battery-Free Cam Lock product page §10 SUPPLIER Why KENRONE. About Kenrone : We have manufactured locks for over two decades, including projects across industrial, utility, and facility-management environments. 01 Factory-direct. No layers between the production line and your project. Pricing reflects what the hardware actually costs to build. 02 CE, FCC, and RoHS certified. Full certification documentation available on request. 03 Flexible order sizes. From pilot quantities to large rollouts, MOQ is set per project, not per catalog. 04 OEM and ODM ready. Custom housing, branding, mechanical interfaces, and firmware-level adjustments are part of our regular workflow. 05 Open integration platform. Documented APIs and SDKs let you integrate unlock, credential management, and access records into FM software, EHS platforms, SCADA, or custom apps. 06 Complete English documentation. Datasheets, installation guides, and integration notes for every product line. §11 Adjacent Categories Related Energy-Retention Cabinets Requiring Project Review The same cabinet-access problem can appear in UPS cabinets, BESS enclosures, solar combiner boxes, EV charging cabinets, and PLC/control cabinets. These applications may involve stored energy, higher environmental exposure, or additional certification requirements. BESS Battery Energy Storage Lithium-cell cabinets retain hazardous DC voltage even when fully disconnected. BMS enclosures, combiner cabinets, and module bays need strict authorization and a verified audit trail. UPS Backup Power Cabinets Battery banks remain energized after main power is removed — the same shock and arc-flash risk as primary distribution panels. SOLAR DC Inverter & Combiner Boxes DC-side conductors carry voltage whenever sunlight reaches the array. No disconnect makes them safe during daylight hours. EV EV Charging Cabinets DC fast-charging cabinets operate at high voltage, with capacitor discharge periods that mirror traditional industrial drives. FLUID POWER Hydraulic & Pneumatic Stored pressure in accumulators and receivers remains a hazard after shutdown. An unqualified hand opens a hazard the system has not yet released. CONTROL PLC & Industrial Control Lower voltage, but unauthorized modification of control logic, parameters, or safety interlocks creates downstream hazards far larger than the cabinet itself. If your project involves these enclosure types, contact us with the cabinet model , environment, and safety requirements before specifying a lock. We will advise whether a cam lock, padlock, swing handle, or custom form factor is appropriate. §12 · TALK TO US Tell us about the cabinets you need to secure. We'll respond with the specifications, samples, or quote your project actually needs. sales@kenrone.com WhatsApp: +86 153 6019 3224 Contact Us * Name * Email * Phone * What are you looking for ? - Select - Message Submit §13 Questions Frequently asked questions. Do these locks function as Lockout/Tagout (LOTO) devices? No. NFC battery-free cabinet locks secure the cabinet enclosure and document who accessed it — they are not LOTO energy isolation devices and do not replace personal padlocks on disconnects, breakers, or valves as required by 29 CFR 1910.147. LOTO requires each worker to maintain personal control over their own isolation device and to verify release of stored energy before beginning work. What the lock provides is the layer LOTO programs don't cover: a verified audit trail of who accessed which cabinet and when, complementing paper-based LOTO documentation. Can a lock be assigned to a single specific worker rather than shared? Yes. Each lock can be configured in single-user mode, where the lock is bound to one named worker who holds the credential for that specific cabinet — useful for a contractor's site cabinet during a defined engagement, or a dedicated tool or records cabinet. This is a 1:1 lock-to-user assignment within our access platform; it is not a LOTO personal-control device and should not be substituted for the personal padlock that 29 CFR 1910.147 requires on energy isolation hardware. Are these locks rated for industrial electrical environments? The lock body operates between −20°C and 65°C, with zinc alloy construction suitable for commercial and light industrial cabinets. They are not currently rated for hazardous-area classifications (Class I Div 1, ATEX), medium-voltage switchgear, or NERC CIP-compliant utility installations. For applications outside these ranges, contact us before specifying. Does the lock need batteries? No. The lock has no internal battery. Power is provided by the smartphone's NFC field during the unlock action. Will the lock fit standard electrical panel cutouts? Standard 19mm and 22mm cam lock cutouts are supported, covering the majority of commercial distribution panels, sub-distribution boards, tenant breaker panels, and PLC enclosures. For three-point latching systems, proprietary handle locks, or sealed outdoor enclosures, alternative form factors are available. Send us your enclosure model and we will advise on compatibility. Can it work offline at remote utility sites? Yes. We offer two app versions: a cloud-connected version for centralized administration and remote credential management, and a fully offline version for environments without network connectivity. Both support the same unlock and access-record functions. The locks themselves never require wiring or network connection. How many users can be authorized per lock? There is no fixed per-lock limit. Authorization can be set per user, per cabinet, per voltage class, per time-of-day, or per project. What happens during an emergency — fire, fault, first responder access? For electrical emergencies, the standard response is to de-energize from upstream, not to open the cabinet door itself. Within normal operations, the lock supports multiple authorized users, so there is always more than one person able to open any given cabinet — a single absent administrator does not lock the facility out, and emergency access can be granted through the app when connectivity is available. NFC cam locks for cabinet retrofit do not include a mechanical override key. If mandatory mechanical entry by first responders is part of your emergency-access protocol, raise this during specification so we can advise on alternatives. Is it electrically safe to use a phone and NFC lock on an energized cabinet door? Yes, within the cabinet types and voltage ranges this page covers. The lock's electronics — NFC coil, chip, motor — sit on the outside of the cabinet door and do not contact, interface with, or pass current to any energized component inside. NFC field energy is in the milliwatt range during the 1–2 second unlock and does not produce arcs or concentrated discharges, so it is not an ignition source in normal atmospheres. Hazardous-area applications (ATEX, Class I Div 1) require separate intrinsic safety certification we do not currently hold. For high-EMI environments, the lock's electrical safety is unaffected, but unlock reliability may benefit from on-site testing. Does the lock interfere with breakers or hardware inside the cabinet? No. The lock secures the cabinet door only. It does not interface with breakers, busbars, or any energized equipment inside the cabinet. Do you provide API or SDK for EHS, SCADA, or FM integration? Yes. Our NFC lock platform provides documented APIs and SDKs for integration with facility management software, EHS platforms, identity providers, SCADA systems, and custom applications. Integration documentation is available on request. References & Footnotes IEC 60364 (LV electrical installations) · ISO 45001 (OH&S management) OSHA 29 CFR 1910.303 (Electrical, general requirements) OSHA Top 10 Most Cited Standards, FY2023 (1910.147) 29 CFR 1910.147 (The Control of Hazardous Energy) 29 CFR 1910.147 (U.S.) · ISO 14118 / EN 1037 (machinery — prevention of unexpected start-up) NFPA 70E / EN 50110 "qualified / authorized person" definition Regional equivalents referenced: EN 50110 · EN 60204 (EU) · HSE Electricity at Work Regulations 1989 (UK) · KEC (Korea) · AS/NZS 3000 (AU/NZ) · SS 638 (Singapore) · GSO (GCC).

Self-storage access control with battery-free NFC locks — the tenant's phone powers the lock, so you retrofit unit doors and manage access from the cloud Self-Storage Access Control — Battery-Free NFC Smart Locks KENRONE delivers self-storage access control built on a lock with no battery inside — a smart lock for self-storage that fits the way facilities actually operate. The tenant's phone supplies both the power and the credential at the tap, so nothing in a dormant unit's lock can drain, replace, or fail. You retrofit the cylinder already in the door and manage the whole site — credentials, overlock, and access logs — from the cloud. Request a facility deployment See how a deployment works For facility operators & multi-site portfolios — integrator & OEM enquiries welcome. The access control lock with zero battery inside. Every mainstream smart lock runs on a battery. KENRONE's does not. The moment the phone touches the lock, the NFC field powers it — the same idea behind a contactless transit card. No in-lock cell Powered by the phone's NFC field. No 2-year battery swaps across the facility. Drop-in cylinder Replaces the mechanical cylinder in the bezel you already have. No new doors, no wiring. Remote control Issue credentials, overlock, and pull access logs from anywhere — no site visit. Home > Solutions > Self Storage Solution > The operating math Three operating costs every storage operator keeps paying A unit-door lock is not a hardware line item — it is an ongoing labor and inventory cost. Here is where the money goes on a managed facility, and which parts access control removes. COST 01 Walking the site Staff patrol units to confirm doors are locked, then drive out to apply or remove an overlock by hand on every delinquency or payment. Removed: lock status & overlock go remote COST 02 Key & cylinder turnover Every move-out means re-keying or swapping a mechanical cylinder — hundreds of times a year on a high-turnover site. Removed: a credential change in software COST 03 Battery replacement Battery-powered smart locks trade the key problem for a battery problem: every lock eventually needs a fresh cell, and a dead one on a dormant unit becomes a lockout call. Removed: there is no battery in the lock Why this matters Why Battery-Powered Smart Locks Moved the Cost Instead of Removing It The industry spent more than a decade trying to make electronic unit locks economical. The early wired systems failed on cost: cabling, power supplies, and battery backups made facility-wide rollout hard to justify. The market's answer was the battery-powered, on-door smart lock — but it removed the wiring while relocating the cost rather than erasing it. Now every lock is a cell on a maintenance schedule, and a unit closed for six months can greet a returning tenant with a dead lock. KENRONE removes the battery at the physics level. The phone's NFC field energizes the lock on contact, so there is no cell in the cylinder to deplete and a unit can sit untouched for a year and open on the first tap. A long-time self-storage IT consultant noted that a phone's NFC signal can power a battery-less lock, but observed the approach had not yet appeared in self-storage deployments. — Industry commentary, self-storage access technology That is the gap this self-storage access control system is built for. How a deployment works From bezel survey to a keyless self-storage facility The lock itself is a drop-in cylinder. The solution is what wraps around it — credentialing, remote control, and logging across the whole site. STAGE 01 Survey the bezel Confirm the cylinder format and door type. Send a photo and we verify fit before any order. STAGE 02 Convert by turnover batch Swap cylinders on vacant units first, then convert each unit as it turns over. Mechanical and NFC run side by side during the rollout. STAGE 03 Provision in the cloud Create tenants and permissions in the platform. Each tenant's phone becomes their digital key at move-in. STAGE 04 Operate remotely Grant or suspend a unit's access and pull its history from the dashboard. The unlock still happens at the door, by phone tap. A real facility is rarely one door type. Indoor roll-up units take the NFC storage-unit cylinder lock ; outdoor units, older sheds, and external-hasp doors are better matched to the NFC storage disc padlock — same battery-free, phone-tap access, different hardware. Built for how facilities run Access Control Capabilities That Match the Operating Reality Unmanned & multi-site Run a facility — or a portfolio — without staff on site Tenants rent, receive a digital key, and move in without meeting a manager. Operators manage every site from one cloud dashboard. Self-service move-in: a digital key is issued to the tenant's phone One login across multiple facilities and unit blocks Real-time access events, retained for dispute resolution Remote overlock Freeze a delinquent unit's access without driving to it One of the largest recurring labor costs in managed storage is sending staff to attach and remove physical overlocks. With cloud-managed NFC cylinders, the operator suspends a unit's credential instead. Suspend or reinstate a single unit's access from the dashboard No second physical lock to attach, store, or track Tie credential changes to your delinquency workflow Phased retrofit Convert units as they turn over — not all at once Retrofitting an active facility usually means entering occupied units to run cable. A drop-in cylinder avoids that — you replace it when a unit is already vacant between tenants. Start with vacant or high-value units and expand at your pace No need to access an occupied unit to install Mechanical and NFC units coexist during the transition What "remote" does and does not mean: the operator controls authorization remotely — who is allowed to open the unit. The unlock still happens at the door when an authorized phone taps the cylinder. There is no remote-open; suspending a credential simply means no phone can open that unit until access is reinstated. Compares How KENRONE Compares to Other Self-Storage Locks Several self-storage locks are also battery-free, but they solve different problems. DaVinci Lock, for example, uses release-code disc locks aimed at vacant-unit and overlock automation, while KENRONE uses electronic NFC authentication with per-entry access logs on the tenant's everyday lock. KENRONE vs DaVinci Lock — NFC electronic access and audit logs vs release-code disc locks KENRONE vs Nokē — battery-free NFC cylinder vs battery-powered external smart lock Working with your stack Integrating with your existing systems Most operators already run a property management system (PMS) for billing, leasing, and delinquency. The access platform is designed to connect to that workflow rather than replace it. KENRONE Cloud exposes a documented REST API and SDK, so access events and credential changes can be tied to your PMS or existing access flow — for example, flagging a unit for overlock when billing marks a tenant delinquent. An honest boundary . KENRONE supplies the lock hardware and a cloud platform with an open API, not a turnkey integration with every PMS on the market. A connection to a specific PMS or gate system is a project-level integration scoped with our team, and we will tell you what connects directly and what needs build work before you commit. Operator economics The cost drivers to model — before anyone quotes a payback Lock-check & patrol labor Staff hours spent walking the site to verify locked doors — replaced by remote lock status. Overlock site visits The labor and travel cost of applying and removing physical overlocks, per delinquency event. Key / cylinder turnover Re-key or cylinder-swap parts and labor, multiplied by your annual move-out volume. Battery replacement The recurring cost battery-powered smart locks carry — and that a battery-free lock removes entirely. Lockout / callout incidents After-hours manager callouts caused by dead batteries or lost keys on dormant units. Self-service rental uplift Revenue and labor effect of letting tenants rent and move in without a staffed office. Learn more Related Resources Products NFC Self-Storage Cylinder Lock NFC disc padlock for storage units Post FAQ Frequently asked questions Do we have to convert the whole facility at once? No. Because the lock is a drop-in cylinder, most operators convert units as they become vacant between tenants, starting with high-value or already-empty units. Mechanical and NFC units run side by side during the transition. Can it connect to our property management system (PMS)? The platform exposes a documented REST API, so access events and credential changes can be tied to your PMS or delinquency workflow. A connection to a specific PMS is a project-level integration scoped with our team, and we confirm what connects directly before you commit. How does remote overlock work without a second physical lock? Authorization is managed in software, so the operator suspends a unit's credential from the dashboard and the delinquent tenant's phone can no longer open it. There is no overlock inventory to store and no site visit to apply or remove it. The lock is never opened remotely; control is over who is authorized, not over the latch itself. What happens to a unit that sits unused for months? Nothing degrades. The lock has no internal battery to discharge while the unit is dormant — the phone supplies power at the tap — so it can sit closed for a year and still open on the first tap. How is this different from the battery smart locks already in the market? Most self-storage smart locks are external, battery-powered units using Bluetooth or a wireless network, with a cell to replace on a schedule. KENRONE's lock is a drop-in cylinder with no internal battery, which removes the battery-replacement cost and the dead-lock lockout that battery designs carry. Can we manage multiple facilities from one place? Yes. The cloud platform is built around multi-site management: one login covers multiple facilities and unit blocks, with per-unit access control and a retained access log for each. Building storage access into your own system? KENRONE manufactures the battery-free NFC lock hardware and provides an open platform with documented API and SDK. Systems integrators and solution providers build on top of it, including OEM/ODM hardware programs and custom credentialing flows. Explore OEM/ODM & API Tell us about your facility Send your unit count, door type, and turnover, and we will scope a phased deployment and model the economics against your numbers — not an industry average. Contact Us * Name * Email * Phone * What are you looking for ? - Select - Message Submit

Hudson Hu — Electronics Engineer at KENRONE Hudson Hu Electronics Engineer at KENRONE Hudson Hu has 10 years of experience in the electronics field and joined KENRONE in 2020. He develops the circuitry, PCB layout, embedded firmware, and electronic functions of KENRONE's locks, and works hands-on through prototype debugging, functional testing, and production optimization to keep products running reliably. He holds a bachelor's degree. Company: KENRONE — NFC Battery-Free Lock Manufacturer R&D Team: KENRONE Engineering Team

Compact round-knob cam lock for cabinet and enclosure retrofits. Tap an NFC phone to unlock — no batteries inside the lock, no keys to track. Drops into standard cam lock cutouts. Home / NFC Cam Lock / KR-NFC-CL5126 / Round Knob NFC Keyless Cam Lock KR-NFC-CL5126 Characteristics Round-profile design preferred Unlock by rotating the whole lock body after NFC authorization For access points requiring quick, intuitive operation Specifications Material : ABS+20%PC Size : Ø 51.48*48.5 mm Door thickness : ≤16 mm Customization : Structure • Dimensions • Appearance Protection class : IP65 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-CL3515 Through the EU CE, ROHS certification and FCC certification KR-NFC-CL75 Through the EU CE, ROHS certification and FCC certification

Jin Liu — Structural Engineer at KENRONE Jin Liu Structural Engineer at KENRONE Jin Liu joined KENRONE in 2024 as a Structural Engineer. He works on the lock-body, component, and assembly design of KENRONE's battery-free NFC locks — preparing engineering drawings and supporting prototype validation, structural testing, and production improvements to ensure products are robust, reliable, and ready for mass production. He holds a bachelor's degree. Company: KENRONE — NFC Battery-Free Lock Manufacturer R&D Team: KENRONE Engineering Team

Zion Zhang — Structural Engineer at KENRONE Zion Zhang Structural Engineer at KENRONE Zion Zhang joined KENRONE in 2022 as a Structural Engineer. He designs the lock bodies, components, and assembly structures for KENRONE's battery-free NFC locks, producing engineering drawings and carrying them through prototype validation, structural testing, and production refinement so that products are secure, reliable, and suited to volume manufacturing. He holds a bachelor's degree. Company: KENRONE — NFC Battery-Free Lock Manufacturer R&D Team: KENRONE Engineering Team

Compact 82mm disc padlock for lockers, gates, and storage doors. Tap an NFC phone to unlock — no batteries in the lock body, no keys to copy. Hardened steel shackle resists bolt cutters. Home / NFC Padlock / KR-NFC-PL82 / NFC Battery-Free Discus Padlock KR-NFC-PL82 Characteristics Discus Padlock form factor, no structural changes Inspections and temporary access points Removable lock for multi-asset reuse Specifications Material : Zinc alloy Size : Lock Beam Ø 9 mm & Ø 82*H34 mm Surface treatment : Polished + Plating + Pearl chrome Customization : Structure • Dimensions • Appearance Protection class : IP65 Operating environment : -25°C~+65°C/10%~90%RH Unlock method : Mobile phone Reverse Power&NFC APP Applications : Containers, Dive-up storage, Self-storage,etc. Dimension line drawing Similar products KR-NFC-PL96 Through the EU CE, ROHS certification and FCC certification KR-NFC-PL4046 Through the EU CE, ROHS certification and FCC certification

Contact KENRONE for NFC battery-free lock pricing, OEM enquiries, and technical support. Email sales@kenrone.com or WhatsApp +86 153 6019 3224. Contact us For any inquiries, please contact Kenrone through the channels below > Contact Us > Partnership & Inquiries Phone +86 153 6019 3224 Email sales@kenrone.com Whatsapp +86 153 6019 3224 Contact Us * Name * Email * Phone * What are you looking for ? - Select - Message Submit The address of our company Our company is located in : Build11, Liandong U Valley, Zhenye Road, Sanhe Street, Huiyang District, Huizhou, Guangdong, China Follow Us Contact KENRONE for more free professional consultation. Let us assist you in upgrading your management solutions.