Rechargeable Battery Battery Size AAA Battery Chemistry Nickel-Metal Hydride Voltage - Batteries 1.2V DC Recharge Time 16 hr Capacity - Batteries 600 mAh Shelf Life 5 yr Rechargeable Up To 1500 Times Precharged Yes Max Operating Temp 122 Degrees F Min Operating Temp -4 Degrees F Standard Battery Pack Size 4 Diameter 0.39 in Height 1.71 in Overall Height 1.75 in Standard Battery Series Recharge Package Quantity 4