Nickel-cadmium battery (NiCd): Used for motorized equipment and other high-discharge devices. NiCd batteries can withstand even more drain than NiMH; however, the mAh rating is not high enough to keep a device running for very long, and the memory effect is far more severe.
Nickel-metal hydride battery (NiMH):
Used for high-tech devices. NiMH batteries can last up to four times longer than alkaline batteries.
Rechargeable alkaline battery:
Uses similar chemistry as non-rechargeable alkaline batteries and are best suited for similar applications. Additionally, they hold their charge for years, unlike NiCd and NiMH batteries.
