Battery Type: NI-MH Battery Nominal Voltage: 1.2V Nominal Capacity: 4500mAh Model: 18670-4500 Battery Brand: VCELL/OEM Charge Cut-Off Voltage: 1.5V Discharge Cut-Off Voltage: 1.0V Standard Charge: 0.2C Fast charge current: 0.5C Maximum Continuous Discharge Current:3.0C Peak Discharge Current: 5.0C( 500 cycles at 80% DOD Lifetime: >3 Years