Neewer 2x C-S2 Rechargeable Li-ion Battery for Blackberry Curve 7100 7130 8300 8310 8320 8330 8700 8707 8520 C-S2 Rechargeable Li-ion Battery for Blackberry Electron 8700 etc Output Voltage: 3.7V Model: C-S2, BAT-06860-004 Type: Rechargeable Lithium-ion Quantity: 2