Battery
Description Spare part number
Battery, 4-cell, 48 WHr, 4.21 Ah L12791-855
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. Place the computer in “Battery Safe mode” (Battery Safe mode on page 31).
3. Disconnect all external devices connected to the computer.
4. 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.
5. Remove the following components:
a. Service door (Service doors on page 32).
b. Keyboard (Keyboard on page 40)
c. Top cover (Top cover on page 47)
To remove the battery:
1. Position the computer upright on a at surface and open the display as far as possible.
2. Remove both I/O board cables from on top of the battery (1).
3. Remove the four Torx T8 2.5×4.0 screws (2) that secure the battery to the computer.
4. Rotate the bottom of the battery upward, and then lift the battery out of the computer (3).
Reverse this procedure to install the battery.
52 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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