User`s manual

Chapter 3
Power system
Charging the Lithium-Ion Battery Pack
The HT650's batteries can be charged via the USB or serial communication cable, or via the
optional docking station - both using the included AC adaptor. Please charge the battery for at
least 4 hours per session to ensure a full charge. Please note that the first time charge should
be for at least 16 hours (see the description below).
Charging the Main and Backup Battery for the First Time
When first charging the HT650, please allow at least 16 hours to fully charge both the main and
backup batteries. Data loss can occur if the backup battery is not adequately charged.
A properly charged backup battery can store data for up to 2 hours without power from the main
battery. This is not recommended. Please make sure an adequately charged main battery or AC
power is presented and try not to rely on the backup battery for other than unusual or
emergency situations. To prevent data loss due to backup battery failure (always a slim
possibility), please minimize the amount of time that the backup battery has to operate without
the main battery pack installed or while disconnected from AC power.
Environment Consideration for Charging
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 -5°C to 50°C. Charging
batteries outside of the specified range could damage the batteries and shorten their charging
life cycle.
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