Lenovo IdeaCentre 3 User Manual page 61

The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell
battery lasts forever. If the coin-cell battery fails, the date and time information is lost. An error message is
displayed when you turn on the computer.
Replacement procedure
1. Remove the computer cover. See "Computer cover" on page 38.
2. Disengage the latch.
3. Remove the coin-cell battery.
4. Install the coin-cell battery.
5. Secure the coin-cell battery with the latch.
.
Chapter 4 CRU replacement
55