Power System; Charging The Lithium-Ion Battery Pack; Charging The Main And Backup Battery For The First Time - Unitech HT680 User Manual

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
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.
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.
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