Telewave.io 44DL Quick Start Guide
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Lithium Battery Management
Lithium-ion batteries are used in the 44DLto supply power. The behavior of the 44DLbatteries is
similar to other devices that use the same battery technology (cell phones, iPads, etc.). Please
carefully read this section regarding battery safety and operation details.
Battery charging and discharging
The battery can be charged when the 44DL is on or off and can be charged from any USB source
that can support a 2.4-amp load (wall charger, vehicle adapter, etc. –laptop not recommended)
Charging begins automatically when power is applied to the USB port.
NOTE: Two Power Management Rules
•Always make sure that there is at least one bar (2 hours) battery life before using the 44D.
•Unplug the USB cable before operating the power switch (turning the power on or off) and
then plug USB cable back in if needed for charging or operation
•When the 44DL is powered off, the blue power ring will illuminate (but the display will
not be illuminated) indicating that the batteries are charging.
•When the 44DL is on, the battery life indicator turns yellow indicating that the batteries
are charging.
•Depleted batteries will require 8 hours of charging time to reach a full charge.
•Fully charged batteries will support about 8 hours of active operation.
NOTE: The 44DL can be used when charging, but when the charger is in trickle mode there is not
enough current provided to operate the 44D; the batteries will eventually be depleted.
WARNING
•The batteries must be discharged to 1/3 or less capacity before the unit can be transported by
Air. This is a legal and safety requirement for all lithium batteries.
•The internal batteries are not user serviceable. The 44DLmust be returned to Telewave for
service if the batteries no longer accept or retain a sufficient charge.
•Excessive cold or hot temperature can damage the batteries or create a fire hazard.
CAUTION
•Fully charge the batteries upon initial receipt, also before and after long term storage.
•Fully charge the batteries at least once a month during long term storage
•The batteries may self-deplete and malfunction unless they are periodically re-charged.
•Once the internal charging controller detects that the batteries are fully charged, it will reduce
the charging rate to trickle. The rate will remain at trickle until the USB is unplugged.
•The 44DLcan be left on the charger for longer than 24 hours, but this is not recommended.
•The 44DLis protected by internal fuses. If the battery is shorted the fuses may blow requiring
factory replacement.