The SB-U50 is a battery replacement solution for the Sony FS5, FS7, and PMW-Series camcorders and more! The batteries feature a USB output and D-Tap Advanced output, capable of charging the battery or powering 12V accessories (D-Tap charger, VL-DT1, is necessary to charge using D-Tap Advanced). The SB-U50 features 48Wh / 3.3 Ah of capacity and for power indicator LED's.