Lenovo ThinkCentre A61e - Manual (Page 21)

3. Insert the notched end 2 of the memory module into the socket 1 . Press the
memory module firmly, and pivot the memory module until it snaps into place.
Make sure that the memory module is firmly fixed in the connector and does
not move easily.
4. To complete the installation, go to Chapter 4, “Completing the parts
replacement,” on page 27.
Replacing 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 (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 Safety and Warranty Guide for
information about replacing and disposing of the battery.
This section provides instructions on how to replace the battery.
1. Remove the computer cover. See “Removing the cover” on page 11.
2. Locate the battery. See “Identifying parts on the system board” on page 9.
Figure 5. Installing a memory module
Chapter 3. Installing options and replacing hardware 13