Atomos Power Station Video Dual Battery System #ATOMPWS002 Specification: Material of Construction: ABS polycarbonate Input Voltage: DC Input: 12 to 19 VDC D-Tap (via optional adapter): 12 to 19 VDC Battery: 7.4 VDC (8.4 VDC max.), 2 slots Battery Type: Sony L-series Power Outputs: On DC Power: 2 x 8.4 VDC, 4 A max. USB Charging: 2 x USB outputs, 5 VDC, 3 A max. total Maximum Power Output: 38W Battery Charging: 2 x 1.6 A (on DC power) (approx. 3 hours to charge NP-F570 battery) Dimensions: 2.20 x 6.30 x 1.40 Weight: 4.40 oz.