77 Watt Hour</br>14 Volt</br>Compatible with Sony PMW-300</br>USB port</br></br>Product Description</br></br>Frezzi's new Power Block Battery is a 77WH 14V replacement for existing Sony PMW-300 batteries.  It offers 20% more run time and has a built in meter and USB port.</br><br/>http://www.amazon.com/gp/product/B01D309VM6