Battery
Description Spare part number
6-cell, 53-WHr, 2.55-AHr, Li-ion 921438-855
3-cell, 51-WHr, 4.45-AHr, Li-ion 921439-855
Before removing the 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 30).
Remove the battery:
1. Disconnect the battery cable (1) from the system board.
2. Detach the grounding tape (2) that secures the battery to the computer.
3. Remove the four Phillips PM2.0×3.4 screws (3) that secure the battery cover retention hooks to the
keyboard/top cover.
4. Remove the battery (4).
Reverse this procedure to install the battery.
Component replacement procedures 33
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