Acer Altos G520 series - Manual (Page 72)

3 Upgrading the system 62
Replacing the Backup Battery
The lithium battery on the server board powers the RTC for up to 10
years in the absence of power. When the battery starts to weaken, it
loses voltage, and the server settings stored in CMOS RAM in the RTC
(for example, the date and time) may be wrong. Contact your customer
service representative or dealer for a list of approved devices.
1 Observe the safety and ESD precautions above and at the
beginning of this book.
2 Turn off all peripheral devices connected to the server. Turn off
the server.
3 Remove power from your system by unplugging the AC power
cord.
4 Remove the chassis cover.
5 Locate the battery.
6 Gently pull back on the metal tab to release the battery.
7 Remove the battery from its socket. See “Battery” in “Mainboard
layout”
8 Dispose of the battery according to local ordinance.
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