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Replacing the battery
Your computer has a special type of memory that maintains the date, time, and
configuration information for built-in features. The battery keeps this information
active when you turn off the computer.
The battery normally requires no charging or maintenance throughout its life,
however, no battery lasts forever. If the battery fails, the date, time, and
configuration information, including passwords, are lost. An error message is
displayed when you turn on the computer.
Before performing the following procedure, be sure to read and understand the
information about replacing and disposing of the battery in the "Lithium battery
notice" section of the ThinkCentre Safety and Warranty Guide.
To replace the battery, do the following:
1. Remove the computer cover. See "Removing the computer cover" on page 83.
2. Locate the battery. See "System board connectors" on page 82.
3. Remove the old battery.
Figure 15. Removing the old battery
4. Install the new battery.
Figure 16. Installing the new battery
5. Reinstall the computer cover and reconnect the cables. See "Completing the
6. Turn on the computer and all attached devices.
104
Hardware Maintenance Manual
Attention
Do not open your computer or attempt any repair before reading and understanding the
"Important safety information" in the ThinkCentre Safety and Warranty Guide that came with
your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to:
http://www.lenovo.com/support
FRU replacement" on page 106.
Note: When the computer is turned on for the first time after replacing the
battery, an error message might be displayed. This is normal after
replacing the battery.
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