This 48Wh IDX 14.4V Li-Ion Battery for Sony BP-U Mount Cameras provides power for your Sony FS7, FS5, and PMW-series cameras. It incorporates a USB port and D-Tap Advanced power port which can be used for powering your accessories. A four-LED gauge indicates the charge state of your battery. The battery's internal circuitry provides over-charge, over-discharge, and high load overcurrent protection.