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Coin-cell battery

Coin-cell battery provides power to the Complementary Metal‑Oxide Semiconductor (CMOS) chip while the computer is turned off. The CMOS chip contains the time, date, and other configuration information about your computer. Under normal usage conditions, the coin-cell battery can last for several years. Factors affecting the coin‑cell battery life are the type of system board, temperature, the time for which the computer is powered off, and so on.

Image: Coin-cell battery

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