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Removal and replacement procedures
Maintenance and Service Guide 4–39
RTC battery
Before removing the RTC battery, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on,
and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet, and then
unplugging the AC adapter from the computer.
4. Remove the battery (see “Battery” on page 4-7).
5. Remove the keyboard and switch cover (see “Keyboard and switch cover” on page 4-22).
Remove the RTC battery:
1. Disconnect the RTC battery cable 1 from the system board.
2. Detach the RTC battery 2 from the top cover. The RTC battery is attached to the top cover with
double-sided tape.
Reverse this procedure to install the RTC battery.
Description Spare part number
RTC battery 581075-001