Replacing The Battery - Lenovo 7099B8U Hardware Maintenance Manual

Figure 14. Installing the memory module
8. Reinstall any parts and reconnect any cables that have been removed or disconnected.
9. To complete the installation or replacement, go to "Completing the parts replacement" on page 94.

Replacing the battery

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
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 "Batteries" and "Lithium battery notice" sections of the ThinkCentre
Safety and Warranty Guide.
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. Remove the computer cover. See "Removing the computer cover" on page 71.
3. Locate the battery. See "Locating parts on the system board" on page 69.
4. Remove any parts and disconnect any cables that might prevent your access to the battery.
5. Remove the old battery.
Figure 15. Removing the old battery
6. Install the new battery.
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ThinkCentre Hardware Maintenance Manual