Unitech PA500, User Manual, Page: 2 / 92

Notice
This unit is equipped with a battery pack and backup battery. It is possible that the
Unitech PA500 may not power-on due to battery discharge as a result of storage.
In the above situation, plug the PA500 to the USB charging cable which is with DC in
port or put the unit into the cradle or docking station (with 5V/3A AC-DC adapter),
and recharge the unit for 16 hours in order to fully charge its backup battery.
The backup battery will charge from external power or the main battery (if the main
battery still has enough power to turn on). In the event the main battery is fully
charged, refrain from using the PA500 for 16 hours in order for the main battery to
fully charge the backup battery.
Backing-up data by backup battery only without the main battery installed in battery
compartment may take as long as 1 hour. Therefore, in order to prevent data
protection failure due to backup battery failure, do not leave the PA500 without the
rechargeable battery pack installed, or without connection to AC power for an
extended period of time.
Battery charge notice
It is important to consider the environment temperature whenever you are charging
the Lithium-Ion battery pack. The process is most efficient at normal room
temperature or slightly cooler. It is essential that you charge batteries within the
stated range of 0°C to 50°C. Charging batteries outside of the specified range could
damage the batteries and shorten their charging life cycle.
Storage and safety notice
Although charged Lithium-Ion batteries may be left unused for several months, their
capacity may be depleted due to build up of internal resistance. If this happens they
will require recharging prior to use. Lithium-Ion batteries may be stored at
temperatures between -20°C to 60°C, however they may be depleted more rapidly at
the high end of this range. It is recommended to store batteries within normal room
temperature ranges.