Panasonic VW-VBL090PPK (VW-VBL090) Battery Pack Rechargeable Lithium Ion Battery 3.6V, 895 mAh Includes a function to check whether the battery and unit can be safely used together Remaining Battery Life Display with models that will support this function For Compatible Models - Panasonic SDR-T55, SDR-T50, SDR-S50 Camcorders