Swit PB-H290S 28V 290W V-mount akku: SWIT PB-H290S, 290Wh 28V/14V Smart Battery, V-mount, Smart Bi-Voltage battery with 28V(22-33.6V) /14V(11-16.8V) auto switching SWIT patent 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 200W stable output Only 3 hours with 6A fast charging (by SWIT S-3812S) 8-LED indicators >