The nickel-cadmium or NiCd battery is a rechargeable battery that uses a nickel oxide hydroxide and metallic cadmium as electrodes. NiCd batteries are fast to charge and can take a high number of charges if properly taken care of and not misused.
Ni-Cd cells are available in the same sizes as alkaline batteries, from AAA through D, as well as several multi-cell sizes, including the equivalent of a 9 volt battery. They can be used in RC airplanes, boats, and cars, as well as cordless power tools, photographic equipment, flashlights, and toys.
NiCd batteries retain their charge better than alkaline or NiMH batteries do. This consistent voltage is desirable for many users because there is no loss in performance when the batteries reach the end of their charge cycle. NiCd batteries last longer due to their low discharge rate, and have a longer storage life. NiCd batteries can be charged using most NiCd or NiMH battery chargers.