Sony NPFS21 Rechargeable S Series Camcorder Battery for DCRPC1 and DCRPC5 InfoLithium Rechargeable Battery Pack for DCR-PC1 Up to 145 minutes continuous recording time Built-in microprocessor accurately calculates remaining battery life within minutes 3.6V, 8.2Wh with no Memory Effect Convenient back-up or main camcorder battery