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Replacing the battery
Attention
Do not open your computer or attempt any repair before reading and understanding the “Important safety
information” in the ThinkCentre Edge Safety and Warranty Guide that came with your computer. To obtain a
copy of the ThinkCentre Edge Safety and Warranty Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the battery.
Your computer has a special type of memory that maintains the date, time, and settings for built-in features,
such as parallel-port assignments (conguration). A battery keeps the information active when you turn
off the computer.
The battery normally requires no charging or maintenance throughout its life. However, if the battery fails,
the date, time, and conguration information (including passwords) are lost. An error message will be
displayed when you turn on the computer.
Refer to “Lithium battery notice” in the ThinkCentre Edge Safety and Warranty Guide for information about
replacing and disposing of the battery.
To replace the battery, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or other at surface. Hold the sides of your computer and
gently lay it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 91.
4. Locate the battery on the system board. See “FRU locations” on page 82.
5. Remove the system board shield or open the system board shield window to get access to the battery.
See “Removing and reinstalling the system board shield” on page 98
or “Opening the system board
shield window” on page 107.
6. Remove the battery.
Figure 34. Removing the battery
7. Install a new battery.
108 ThinkCentre Edge Hardware Maintenance Manual