The nickel-metal hydride battery (Ni-MH) is a new type of high-capacity rechargeable lithium battery that has many of the same characteristics as nickel-cadmium batteries as well as better characteristics than nickel-cadmium batteries and is expected to replace the traditional type of nickel-cadmium batteries. The Ni-MH battery has a working voltage of 1.2V and the general model specification is the same as the Ni-Cd battery.
It has a large single cell capacity, low internal resistance, and no memory effect; the flaw is a high self-discharge rate. As an example, the battery capacity level is the same as the most commonly used No. 5 (AA type) rechargeable battery, with a volume of 1000-1300MAH, which is widely used in cell phone solar panels and digital camera switching power supply.
