Rechargeable Battery, Battery Size AA, Battery Chemistry Nickel-Metal Hydride, Voltage - Batteries 1.2V DC, Recharge Time 16 hr, Capacity - Batteries 1,350 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 0.55 in, Height 1.93 in, Overall Height 1.97 in, Standard Battery Series Recharge, Package Quantity 4 This product contains a chemical that is regulated under California Proposition 65. Warning: This product contains a chemical known to the State of California to cause cancer. -