Cmos Battery; Bridge Battery - NEC VERSA FX Service And Reference Manual

CMOS Battery

This lithium battery (3 Volts, 30 mAH capacity) 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 Standby mode giving you time to install a fully
charged battery or connect to AC power when your battery charge becomes low. The bridge
battery stores 7.2 Volts, 40 mAH.
System Overview 1-11