Schonstedt Instruction Manual

21
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Recommendations for Battery Charging and Storage
Due to the composition of the battery and the safety features built into the charger, it
may be necessary to complete two or more full-charging cycles in order to bring the
battery back to full capacity after it has been completely discharged. If you suspect
the battery has been fully depleted, such as when it has been in storage for a long
time or when the transmitter won’t turn on, it is recommended to do at least two
consecutive charging cycles before resuming normal use of the battery. Make sure
you unplug the charger from the battery in between the two cycles.
Before normal charging can begin, the battery pack temperature and voltage must
fall within predetermined acceptable limits. The temperature must be between 50°
and 104°F (10° and 40°C). When the charger detects that these two conditions are
not met, it will continue to “trickle charge” until the two conditions are met. Then, it
will start normal charging.
If the battery is faulty and never reaches an acceptable voltage to start normal
charging, the charger continues to trickle charge. In this case, only a small fraction of
full charge will be reached after the normal 4-hours of charging time.
If the charger is charging the battery in normal charge mode and the temperature
rises above 140°F (60°C) before the battery is fully charged, the charger will switch to
trickle charge mode. In this case, full charge may not be achieved after the normal
4-hours of charging time. The battery pack also contains a thermostat that will open
the circuit for safety if it gets too hot.
The higher the storage temperature, the faster the battery will self-discharge,
reducing its shelf life. The recommended storage temperature is 50° to 70°F (10° to
20°C). Storing the battery at higher temperature can reduce its overall life; storing it
at colder temperatures is preferred and beneficial.
Battery Replacement
The rechargeable NiMH battery pack that powers the transmitter should provide a
very large number of charge-discharge cycles. However, like all rechargeable
batteries, it has a finite life and eventually may have to be replaced if it can’t hold or
can’t reach a full charge. In addition, if the transmitter is malfunctioning due to a
defective battery, the user can replace the battery in the transmitter with a new one
received from Schonstedt.
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CAUTION
When replacing the transmitter battery, only use
Schonstedt batteries!