How Does a Computer Keep Time When It's Off? Understanding RTC Functionality

Learn how computers track time when powered off using Real-Time Clock (RTC) batteries.

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A computer uses a real-time clock (RTC) battery to keep track of time when it is off. This small battery powers the RTC chip, ensuring the system maintains time even when unplugged. Regularly replacing the RTC battery ensures the computer continues to keep accurate time.

FAQs & Answers

  1. What is a Real-Time Clock (RTC)? A Real-Time Clock (RTC) is a device that keeps track of the current time, even when the computer is powered off, using its own battery.
  2. How often should I replace my computer’s RTC battery? It's generally recommended to replace the RTC battery every 3 to 5 years, or when you notice the computer is losing time.
  3. What happens if the RTC battery fails? If the RTC battery fails, the computer may not be able to keep the correct time, and you might experience issues with timestamps on files.
  4. Can I use a different battery for my RTC? It's best to use the specific type of battery recommended by the manufacturer for your computer's Real-Time Clock.

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