Battery
Description Spare part number
Battery, 4-cell, 48 WHr, 4.21 Ah 851610-855
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 32).
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 doors (Service doors on page 33).
b. Hard drive (Hard drive on page 41)
c. Keyboard (Keyboard on page 44)
d. Top cover (Top cover on page 48)
e. Card reader board (Card reader board on page 59)
To remove the battery:
1. Position the computer upright on a at surface and open the display as far as possible.
2. Remove the Torx T8 2.5×5.0 screw (1) that secures the battery to the computer.
3. Rotate the bottom of the battery upward (2), and then lift the battery out of the computer (3).
Reverse this procedure to install the battery.
64 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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