Rechargeable Battery Battery Size D Battery Chemistry Nickel-Metal Hydride Voltage - Batteries 1.2V DC Recharge Time 5 hr Capacity - Batteries 2 500 mAh Shelf Life 3 yr Rechargeable Up To 300 Times Precharged Yes Max Operating Temp 122 Degrees F Min Operating Temp 32 Degrees F Standard Battery Pack Size 2 Standards ANSI Diameter 1.31 in Height 2.32 in Overall Height 2.38 in Standard Battery Series Recharge Package Quantity 2