Acer Altos G901 Acer Altos G901 User's Guide - Page 103

87 Backup battery The lithium battery on the mainboard powers the real-time clock (RTC) 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) might be incorrect. For a list of approved replacement batteries, contact your customer service representative or dealer. Warning! Danger of explosion if battery is incorrectly replaced. Replace with only the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. Replacing the battery 1 Before proceeding, record your custom BIOS settings. 2 Disconnect the AC power cords from the power source or wall outlets. 3 Turn off all peripheral devices connected to the server system. 4 Remove the following: a Rear access panel - refer to page 44 b System board access panel - refer to page 51 c Memory board - refer to page 52 d Processor board - refer to page 54 5 Slide the battery in the direction shown in Figure 46, allowing the battery to pop up.