Listen LR 400, Design Manual & Manual

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Supplementary
Battery Charging Information
Charging with a drop-in charger
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nect the charger to power. Make sure the unit is fully seated in its slot.
IMPORTANT: DO NOT ATTEMPT TO CHARGE ANY TYPE OF BATTERY OTHER THAN NiMH (NICKEL METAL HYDRIDE) with
your Listen equipment. Alkaline batteries may explode when connected to a charger. Other risks of
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IMPORTANT: In order to charge NiMH batteries, the BATTERY SELECT switch in your Listen product must be set to the
NiMH setting. Use a pen or small screwdriver to move the switch (located in the battery compartment)
to the proper position.
WARNING: The case lid MUST be open or removed while the units are charging. The charging process generates
heat. Air ventilation is required. It is best to store your charging case at room temperature away from
heat sources and direct sunlight
The Listen receivers are unique because they have SmartCharge™ chargers built in. When any of these units are placed into a Listen
charging case, NiMH batteries will be charged.
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takes about 13 hours. Listen recommends that you allow the charger to complete its full cycle every time for maximum battery life.
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When not using the receiver, it is recommended to leave the unit on the charger. The charger provides a “maintenance”
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NOTE: Listen provides 2300 mAH (milli-Amp-hour) constant current NiMH Nickel Metal Hydride) batteries. These
may be purchased from Listen (part number LA-362).