This is a rechargeable battery very similar to the nickel-cadmium (NiCd) battery. The difference is that the Nickel-metal hydride battery makes use of a different alloy as its negative electrode as opposed to using cadmium. The positive is similar to the nickel-cadmium which used the nickel oxyhydroxide. The aptitude of these battery types is usually 2 or 3 times that of the nickel cadmium [...]