The capacity is 7800mAh. It has 2 D-tap outputs, 2 USB ports allowing additional charging of mobile phones, tablets, on-camera light sources<br />The battery case is made of heat-resistant ABS plastic the contacts are made of copper. Not subject to the memory effect can be charged at any time without loss of capacity<br />Dual sided power supply battery charger for Sony V-Mount batteries. Charge two high capacity V Mount batteries simultaneously<br />Designed with 7 LED indicators light to clearly show the charging status. Charging indicator light is on (Red) when it starts charging. When charging light power reaches 85%, the light will turn from red to green. When charging is done, the light will turn off ">