Lenovo ThinkCentre 3026 Maintenance Instructions Manual page 129

Your computer has a special type of memory that maintains the date, time, and
settings for built-in features, such as parallel-port assignments (configuration). A
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.
Refer to the "Lithium battery notice" in the ThinkCentre Safety and Warranty Guide
for information about replacing and disposing of the battery.
To replace the battery, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Open the computer cover. See "Opening the computer cover" on page 120.
3. Locate the battery. See "Locating parts on the system board" on page 122.
4. Remove the old battery.
Figure 43. Removing the old battery
5. Install a new battery.
Figure 44. Installing a new battery
6. Close the computer cover and connect the cables. See "Completing the parts
7. Turn on the computer and all attached devices.
8. Use the Setup Utility program to set the date, time, and any passwords. See
9. Go to "Completing the parts replacement" on page 148.
Chapter 9. Replacing FRUs (Machine types: 3026, 3039, 3137, 3149, 3245, 3269, 3319, 3394, 3491, 3627, 3699, 3878, 4972, 5132, 5261,
replacement" on page 115.
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.
Chapter 6, "Using the Setup Utility program," on page 51.
5297, 5391, 5472, 5485, 5536, 5548, 5567, 5864, and 6213.)
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