Power Supply 55
E-EQ-MX3RFIDRG-A MX3-RFID Reference Guide
The Low Battery Warning will transition to Critical Suspend before the computer powers
off.
Critical Suspend State
The Critical Suspend state or mode is entered because of a main battery Power failure. A main
battery Power failure can occur because the battery energy has been depleted or the battery has
been removed.
When the mobile device is in the Critical Suspend state the main battery LED illuminates, the
System LED blinks red, all peripherals are shut down, the CPU clock is stopped, and power is
removed from the PCMCIA card(s). The operating system is saving the state prior to the backup
battery failing and cannot be used.
If a new fully charged main battery is installed before the backup battery fully depletes, the
operating system will transition to the Suspend state. To resume operation tap the Power key.
Backup Battery
The mobile device has a backup battery that is designed to provide limited-duration electrical
power in the event of main battery failure. The backup battery is a 50 mAh Nickel Cadmium
(NiCd) battery that is factory installed in the unit. The need for recharging of the backup battery is
automatically detected and controlled by the operating system. The energy needed to charge the
backup battery is drawn from the main battery.
It takes several hours of operation before the backup battery is capable of supporting the operation
of the computer. The duration of backup battery life is dependent upon operation of the mobile
device, it’s features and any operating applications.
The backup battery is replaced by LXE.
Note: An uninterrupted external power source (wall AC adapters or DC/DC converters)
transfers power to the mobile device’s internal charging circuitry which, in turn,
recharges the main battery and backup battery.
Maintenance
Note: Make sure there is a fully charged main battery in the mobile device before running the
backup battery Discharge Utility. The backup battery can be discharged and charged
while the mobile device is receiving external power through the power jack on the
endcap.
The NiCd backup battery should be discharged completely once or twice a year. The main battery
will fully charge the backup battery. This process will allow longer life for the backup battery.
The backup battery is discharged by selecting Start | Settings | Control Panel | Battery and
tapping the “Discharge” button. The discharge utility shows the progress of the discharging. At
this time, the program can be exited while continuing the discharge process. Normal use of the
mobile device can resume during the discharge, with the exception of Hot-Swapping the main
battery. When the backup battery is fully discharged, the mobile device will automatically stop the
discharge process and begin to recharge the backup battery.
DO NOT REMOVE THE MAIN BATTERY from the mobile device until the backup battery is
completely discharged. Discharge requires approximately 1 hour and recharge requires
approximately 2.5 hours.
