What is the difference between Nickel Cadmium (NiCd), Nickel Metal Hydride (NiMH) and Rechargeable Alkaline Manganese (RAM) rechargeable batteries?

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What is the difference between Nickel Cadmium (NiCd), Nickel Metal Hydride (NiMH) and Rechargeable Alkaline Manganese (RAM) rechargeable batteries?

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A. Besides the environmental impact of containing highly toxic Cadmium, NiCd batteries also lose their power faster than NiMH batteries during storage and have an issue called memory effect, which may prevent the battery from completely recharging to full power capacity. NiMH batteries are considered to be free of the memory effect, especially when used with a technologically advanced battery charger. RAM batteries have lower capacities than standard alkaline batteries and can only be recharged about 50 times. NiMH batteries can be recharged up to 1,000 times.

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