User's Manual

17
Chapter 3
Power system
Charging the Lithium-Ion Battery Pack
The HT680'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
Note: When first charging the HT680, please allow at least 16 hours to fully
charge both the main and backup batteries. When the HT680 arrives
from the factory the backup battery switch is in the OFF position in order
to protect the backup battery. Before first charging the HT680, make
sure the backup battery switch is moved to the ON position. The backup
battery switch can be found inside the main battery compartment. Data
loss can occur if the backup battery is not adequately charged -
therefore it is imperative to ensure that the backup battery switch is in
the ON position before charging for the first time.
Note: A properly charged backup battery can store data for up to 72 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.