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