This battery has a super high capacity of 10,000 mAh and is a D sized NiMH Battery at 1.2V. It can last up to twice as long as ordinary Ni-Cd rechargeable batteries, has an excellent cycle life (can be recharged from up to 1,000 times), sports memory free operation, can be quickly charged at a 1 C rate with an auto cut-off device or charged at a standard rate at 1,000 mA current for 12 hours. The Tenergy D battery is ideal for power intensive devices such as radios, scooters, and RC cars.