Unitech Electronics Co. Ltd. PA500 Benutzerhandbuch

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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.