Cmos Battery; Bridge Battery - NEC VERSA LX Manual

CMOS Battery

This lithium battery provides battery backup and prevents data loss in
the system's complementary metal oxide semiconductor (CMOS) RAM.
This memory area contains information on the system's configuration,
for example date, time, drives, and memory. The CMOS battery charges
when your NEC Versa is connected to AC power. The CMOS battery
may discharge completely if the NEC Versa notebook remains unused
for approximately two months.

Bridge Battery

The bridge battery saves your system status in Suspend mode for up to
five minutes. This gives you time to install a fully charged battery or
plug in AC power when your battery charge becomes low.
The bridge battery should be replaced only by an authorized NECC
technician.
Connect your NEC Versa system to AC power for a
full 24 hours before using it on battery power for the
first time. Doing so insures that the bridge battery is
fully charged and that no data is lost during a battery
change.
Getting Started 2-13