NEC EXPRESS5800/120Ed User Manual page 68

Figure 4-2. Replacing the Real-Time Clock Battery
1. Power off the system and ensure it is disconnected from the AC power
source.
2. Remove the left side panel as described earlier in this chapter.
3. If present, remove the protective plastic cover located over the top of the
lithium battery.
4. Insert the tip of a small flat-bladed screwdriver, or equivalent, under the
plastic tab on the San-in plastic retainer.
5. Gently push down on the screwdriver to lift the battery (Figure 4-2B).
6. Remove the battery from its socket (Figure 4-2C).
7. Dispose of the battery according to local ordinance.
8. Remove the new lithium battery from its package, and, being careful to
observe the correct polarity, insert it in the battery socket.
9. If applicable, reinstall the plastic cover on the lithium battery socket.
10. Replace the side panel, plug in the system power cord, and turn on the
system.
11. Run the BIOS Setup to restore the configuration settings to the real-time
clock.
4-6 Upgrading Your System