Page 39 of 41
© 2003 Wasp Technologies, Inc.
7
POWER SOURCES
A
rechargeable
Li-ion battery
provides the main power source. A Lithium button cell battery is
used to back up the system’s real time clock and content in the RAM memory when the main
power source is not available.
NOTE.
When using the WDT2200 for the first time, the main battery
must be charged for 3
hours
.
The WDT2200 checks the power level of the main battery when the portable terminal is in use,
however, the backup battery is only checked during power-on-test. Either low battery condition
will signal the user via a warning message on the LCD.
When the main battery reaches a low condition, the LCD flashes a warning Message (“Main
Battery Low”) at one minute intervals while the portable terminal is on. The main battery can
continue to supply power in normal operation for approximately
10~30 minutes.
However, the
level may reach the WDT2200 power cutoff point and automatically turn the Portable terminal
off. In this situation, the lithium battery continues to back up data and application programs in
RAM and the WDT2200 cannot be powered up until the main battery is recharged or replaced.
