Abstract: A battery-powered lock that is capable of communicating with a mobile device is described herein. A mobile device that is authorized to communicate with the lock can send lock and/or unlock commands to the lock. In addition, techniques are described for a station-less bike sharing system using the lock that enables a user to drop off and secure the rented bike anywhere at the end of the trip. Using the integrated GPS on the mobile device, the geographic location of the lock as well as the attached bike is tracked upon any lock/unlock requests. The mobile device communicates with an administration server to determine if a user is authorized to unlock the lock and utilize the bike.