PKCELL NiZn Rechargeable Battery with high voltage,high drain curren,the green Environmental protection&cycle. PKCELL NiZn Rechargeable BatteryType: Sealed Nickel-Zinc BatteryTypical:900mWhrsMinimum:850mWhrsFast Charge:0.5C to 1C in Amps to 1.9V/cell taper charge and cut-offWeight: about 25.0gInternal Impedance ≤20mΩ(at 1000Hz)Size: 14.5D*50.5H