RTC battery
Description Spare part number
RTC battery 857380-001
Before removing the RTC battery, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o 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 rst unplugging the power cord from the AC outlet and then
unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 24).
5. Disconnect the battery cable from the system board (see Battery on page 25).
To remove the RTC battery:
▲
Disconnect the RTC battery cable from the system board (1), and then lift the RTC battery from the
computer (2).
NOTE: The RTC battery is secured with double-sided tape.
Reverse this procedure to install the RTC battery.
Component replacement procedures 29
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