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converters) transfers power to the mobile device internal charging circuitry which, in turn, recharges the main battery and
backup battery.
Note: Once you receive the Low Battery Warning, you have approximately 5 minutes to perform an orderly shutdown and
replace the main battery before the unit powers off. The Low Battery Warning will transition to Critical Suspend before
the MX3Plus powers off.
Critical Suspend State
The Critical Suspend state or mode can only be entered because of a main battery Power failure. A main battery Power failure
can occur because the battery’s 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 cards.
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 MX3Plus 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 comes from the main battery.
It takes several hours of operation before the backup battery is capable of supporting the operation of the MX3Plus. The
duration of backup battery life is dependent upon operation of the MX3Plus, it’s features and any operating applications. The
backup battery is replaced by qualified service personnel.
Note: An uninterrupted external power source (wall AC adapters or DC/DC converters) transfers power to the MX3Plus’s
internal charging circuitry which, in turn, recharges the main battery and backup battery.
Backup Battery Maintenance
Note: Make sure there is a fully charged main battery in the MX3Plus before running the backup battery Discharge Utility.
The backup battery can be discharged and charged while the MX3Plus is receiving external power through the Power
Jack or from a powered cradle.
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 MX3Plus can resume during the discharge, with the exception of Hot-Swapping the main
battery. When the backup battery is fully discharged, the MX3Plus will automatically stop the discharge process and begin to
recharge the backup battery.
DO NOT REMOVE THE MAIN BATTERY from the MX3Plus until the backup battery is completely discharged – in
approximately 1 hour and recharged in approximately 2.5 hours.
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