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How to Change the Battery on an iPod?
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A battery pack requires additional components and circuitry to achieve cell balancing. Cell balancing is defined as the application of differential currents to individual cells (or combinations of cells) in a series string. Normally, of course, cells in a series string receive identical currents. A battery pack requires additional components and circuitry to achieve cell balancing.
A battery is a device that converts chemical energy directly to electrical energy. It consists of one or more voltaic cells, each voltaic cell consists of two half cells connected in series by a conductive electrolyte containing anions and cations.
Battery life can be extended by storing the batteries at a low temperature, as in a refrigerator or freezer, because the chemical reactions in the batteries are slower. Such storage can extend the life of alkaline batteries by ~5%; while the charge of rechargeable batteries can be extended from a few days up to several months.