User's Manual

8200 Series Mobile Computer Reference Manual

1.1.2 BACKUP BATTERY

The backup battery on the main board takes charge when the main battery is removed or

drained out. When fully charged, the 3.0 V/18 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 72 hours to fully charge the backup

battery. However, it is not necessary to fully charge the backup battery for the Terminal

to work.

 Monitor voltage level (see 3.5 Power)

1.1.3 CAUTION OF LOW BATTERY CHARGE

The battery pack is the only power source for the Terminal to work. It also charges the

backup battery on the main board so that 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.