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What is the difference between rechargeable alkaline batteries and Ni-Cd & Ni-MH rechargeable batteries?

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What is the difference between rechargeable alkaline batteries and Ni-Cd & Ni-MH rechargeable batteries?

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Rechargeable alkaline batteries provide lower performance than ordinary alkaline batteries but can be recharged up to about 20 times. Ni-MH (Nickel-Metal Hydride) and Ni-Cd (Nickel-Cadmium) rechargeable batteries can be recharged up to 1,000 times. In addition, if a rechargeable alkaline battery is entirely discharged, there is a strong risk that it can no longer be used and will have to be disposed of. Further, a rechargeable alkaline battery cannot be used for high current-equipment using (digital cameras, flashes, etc.). It is unsuitable for fast charging and needs to be recharged in chargers designed specifically for the purpose. Otherwise, it will allow corrosive electrolyte to escape and damage the charger. In short, the rechargeable alkaline battery represents a high cost for very limited use.

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