SC. The E-Plex 2000 Powerstar Digital Lock from dormakaba (formerly known as Kaba) is self-powered using their unique PowerStar™ technology. The built in super capacitors will hold a full charge for up to 10 weeks with no activity, making this the perfect choice for remote or rarely used storage facilities.. No wiring through door. Vandal resistant keypad. Non-handed; field reversible. Self powering thanks to Kaba's patented PowerStar™ technology