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8700 Series Mobile Computer Reference Manual
1.1.2 BACKUP BATTERY
The backup battery on the main board takes the responsibility to supply power to the
mobile computer when the main battery is removed or drained out. When fully charged,
the 3.0 V/7 mAh rechargeable Lithium button cell helps retain data in SRAM and maintain
the running of the real-time clock and calendar for at least 25 days without the main
battery. In the meantime, you have to replace the main battery as soon as possible. It
takes at least twenty-four hours to fully charge the backup battery. However, it is not
necessary to fully charge the backup battery for the mobile computer to work.
Monitor voltage level by System Menu (see 3.5 Power)
1.1.3 CAUTION OF LOW BATTERY CHARGE
The battery pack is the only power source for the mobile computer to work. It also
charges the backup battery on the main board so the data stored in SRAM can be
retained properly. Therefore when the main battery charge goes low, you need to replace
the battery pack with a charged one or charge it as soon as possible. Most of all, you
should upload important data on a regular basis.
Warning: Data loss may occur with SRAM during low battery condition. Always save
data before running out of power or keep a fresh battery for replacement.
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