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NFC energy harvesting is the process of turning the 13.56 MHz radio field emitted by an NFC device — usually a smartphone — into usable electrical power. Every NFC link is built on inductive coupling between two small antenna coils, and a passive NFC device sitting in that field can do two things at once: exchange data and draw energy (near-field communication standards, ISO/IEC 18092 and ISO/IEC 14443). A battery-free lock pushes the second capability to its logical end. Th

The short answer: NFC is not a competitor to RFID — it is a specialized subset of it. NFC (near field communication) is built on high-frequency RFID at 13.56 MHz, adds two-way communication, and works over roughly 4 cm (ISO/IEC 18092 and related standards). RFID is the broader family, spanning three frequency bands with read ranges from centimeters to ten meters. Bluetooth is a different technology entirely — a battery-dependent radio link designed for continuous connections

An NFC lock is an electronic lock that authenticates users through near-field communication (NFC) — a short-range wireless standard operating at 13.56 MHz over a range of roughly 4 cm (ISO/IEC 18092 and NFC Forum standards). Tap an NFC-enabled phone or card against the lock, the credential is verified, and the mechanism opens. Some designs go further: they carry no battery at all, drawing their operating power from the phone's NFC field itself. A lock with no battery, no wiri