Rechargeable Battery Battery Size AA Battery Chemistry Nickel-Metal Hydride Voltage - Batteries 1.2V DC Recharge Time Charger Dependent Capacity - Batteries 2 500 mAh Shelf Life 5 yr Rechargeable Up To 1500 Times Precharged Yes Max Operating Temp 122 Degrees F Min Operating Temp 14 Degrees F Standard Battery Pack Size 4 Standards ANSI Diameter 0.55 in Height 1.93 in Overall Height 1.97 in Standard Battery Series Duracell Package Quantity 4