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Nickel metal hydride (Ni-MH) batteries have application in hybrid electric vehicles, portable electronic devices such as cameras, shavers, toothbrushes, etc. They offer a higher energy option than Ni-Cd batteries with the hydrogenabsorbing metal hydride alloy (MH) replacing the cadmium electrode in Ni-Cd cell construction. Like Ni-Cd, the Ni-MH also shows the memory effect on repetitive cycle regimes. The nickel metal hydride battery was introduced commercially in 1989. The technology is based on the development of rare earth alloys with nickel that have the ability to reversibly absorb and desorb hydrogen. The... [Pg.434]

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