How Does a Computer Keep Accurate Time and Date?

Discover how computers maintain the correct time and date during startup using a built-in Real-Time Clock (RTC).

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Computers display the correct time and date upon startup thanks to a small battery-powered clock, known as the Real-Time Clock (RTC). This clock keeps running even when the computer is off, allowing it to maintain accurate time and date settings. This ensures continuity and consistent timekeeping across power cycles.

FAQs & Answers

  1. What happens to the time and date when a computer is turned off? When a computer is turned off, the Real-Time Clock continues to run, powered by a small battery, maintaining the correct time and date.
  2. Why do some computers lose time when turned off? If the battery powering the Real-Time Clock is depleted, the computer may lose its time settings when turned off.
  3. Can the RTC be replaced if it fails? Yes, in most cases, the RTC can be replaced if it fails, but the process may vary depending on the computer's design.
  4. How long does the RTC battery last? The RTC battery usually lasts several years, but longevity can vary based on usage and environmental conditions.

Watch More

If you found this explanation interesting, check out our video on how computers manage power consumption and the significance of other crucial hardware components.

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