Panasonic VW-VBJ10 Rechargeabl

3.6 V 940mAh, Actual recordable time is 40 minutes, Continuous recording time 1 hour 10 minutes, Designed for optimum performance for these Panasonic camcorders: SDR-SW20, SDR-S10P1, SDR-S7, Rechargeable Lithium-ion Battery Pack