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  • With the rising number of devices that require batteries, many people have discovered that rechargeable batteries are a great way to save money and reduce environmental impact. Most rechargeable batteries, however, cannot be used indefinitely; they can only be charged a certain number of times before they no longer hold their charge.

    About Nickel-Cadmium Rechargeable Batteries

    Nickel-cadmium rechargeable batteries were the first rechargeable batteries widely available to the public. Nickel-cadmium, or NiCad, rechargeables use a chemical reaction between nickel and cadmium to generate electricity. They are rechargeable because that chemical reaction can be reversed to generate new power which is stored in the battery and slowly released. Most NiCad rechargeable batteries can be recharged between 500 and 700 times before they will no longer hold a charge.

    Getting the Most Out of NiCad Rechargeables

    To get the longest possible life out of your NiCad rechargeable batteries, you should remember a few simple tips. First, be sure that the batteries are fully drained before recharging them: this will prevent the "memory effect," a situation in which the battery only recharges to the point at which it was drained in the past. A battery which was only half-drained may only half charge, leading to less usable time and a shorter battery life. Second, use NiCad rechargeable batteries only in electronic devices that do not require a high level of power. NiCad rechargeables work well for portable radios and toys that require batteries, for example, but are not recommended for digital cameras and other devices that need a high level of power. Also, do not use NiCad rechargeables in extreme high- or low-temperature situations. Extreme low temperatures can affect the batteries' performance and high temperatures can cause these batteries to lose charge more rapidly. Do not store NiCad rechargeables in areas that are not climate-controlled, especially during the heat of summer or the cold of winter.

    Source:

    Radio Shack: Nickel-Cadmium Batteries

    MPowerUK.com: Nickel Cadmium Batteries

    How Do Rechargeable (That Is, Zinc-Alkaline or Nickel-Cadmium) Batteries Work and What Makes the Reactions Reversible in Some Batteries, But Not in Others?

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