SWIT PB-H290S | 290Wh 28V/14V Smart Battery, V-mount, also ideal for long term use or high power draw lights Smart Bi-Voltage battery with 28V(22-33.6V) /14V(11-16.8V) auto switching; SWIT patent; also ideal for long term use or high power draw lights with 250W stable output;290Wh Compatible with all normal voltage equipments and chargers; Dust and Waterproof; For high voltage normal-V-lock Lights and ALEXA 65/LF/SXT,AMIRA; Power info on SONY/RED; 1xD-tap always output normal voltage; Only 3 hours with 6A fast charging (by SWIT PC-P460S/S-3812S); 8-LED indicators; 1.5m Drop-Off really tested; Multiple circuits and peak-current protections