S-4010J JVC's dual battery extender. To ensure the long-time shooting, this extender enables two DV batteries to supply power one by one by automatically switching.
S-8823 is a 7.2V, 18.7Wh Li-ion DV battery that fully compatible with JVC BN-VF823. It can display remaining power percentage and remaining recording time on JVC GY-HM100 camcorder.