REPLACES SONY NP-FV100. LI-ION 7.4V 4200MAH. The battery have a charge capacity of 4200mAh for Compatible with DCR-SR15,DCR-SR21,DCR-SR5,8DCR-SX63 DCR-SX65,DCR-SX83,DCR-SX85,NEX-VG900,HXR-MC50 HXR-NX30,HXR-NX70,HXR-NX80,PXW-Z90V,PXW-X70 Camcorders. so you can keep your Camera devices up and running for a longer time than with regular alkaline batteries.