NEC HX4500 User Manual page 85

Figure 4-6. Location of the Real-Time Clock Battery
Danger of explosion if the battery is incorrectly replaced. Replace
only with same or equivalent type recommended by manufacturer.
Dispose of lithium batteries as required by local ordinance or as
normal waste if no local ordinance exists. Do not expose the
component to excessive heat or fire. Keep all batteries away from
children.
Replace the battery as follows.
Note:
1. Power off the system and remove the top cover as described earlier.
2. If the battery has a protective plastic cover, remove the cover by lifting it away from
the battery. Use your finger nail or a small pointed tool to gently push up the bottom
edge of the battery. See Figure 4-6 for socket location.
3. Orient the new battery over its socket with the plus (+) sign on the battery facing up.
4. Carefully insert the top of the battery into the socket connectors and gently push the
battery into the socket until it is firmly seated in the socket.
5. Replace the top cover and turn on the system.
6. Run the BIOS Setup to restore configuration settings to the real-time-clock.
4-14 Upgrading Your System
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! CAUTION
Observe static precautions. Use an antistatic wrist strap.