NEC PowerMate CT manual Cmos Battery, Locating the Battery on the System Board

CMOS Battery

The system board uses a CMOS battery to maintain system configuration information. The battery is a coin-cell battery mounted on the system board (see the following figure). If it fails to maintain system configuration information, replace it with an identically rated battery from the same manufacturer.

The battery can explode if it is incorrectly replaced or improperly discarded. Use only the same type battery or an equivalent type recommended by the manufacturer when replacing the battery.

Lithium acts as a catalyst when exposed to water and causes spontaneous combustion on contact. Discard used batteries according to the manufacturer’s instructions.

Removing the battery from the system board causes the system to lose system configuration information. Prior to removing the battery, run the BIOS Setup Utility (see Section 2) and print out or write down your system configuration settings. Then you can restore the system to its previous settings.

If you need to replace the battery, follow these steps.

1.Turn off and unplug the system and any external components connected to it.

2.Remove the system cover (see “Removing the Cover” in Section 3). Observe all safety precautions when removing the cover.

3.Locate the battery on the system board (see the following figure).

Locating the Battery on the System Board

A – Battery

4.Press down on the battery clip to release the battery from its socket on the system board.

5.Remove the battery and discard in accordance with the manufacturer’s instructions.

3-30 Disassembly and Reassembly