Charging Batteries - Listen Technologies LR-300 User Manual

LR-400 Charging Batteries
The LR-400 and all Listen receivers are unique because they have SmartCharge™ chargers built
in. When any of these units are connected to an LA-202 wall transformer or dropped into a Listen
charging case, NiMH batteries will be charged.
To charge the batteries using the LA-202 wall transformer, plug the transformer into the jack marked
1
"PWR/CHG" on the side of the unit. The unit can be operated while the batteries are charging.
To charge the batteries using a drop-in charger, simply place the unit into a slot in the charger and
2
connect the charger to power. Make sure the unit is fully seated in its slot.
SmartCharge™ uses a pulse charging, which greatly extends the life of Nickel Metal Hydride (NiMH)
batteries. The entire charging process takes 13 hours. Listen recommends that you allow the charger
to complete its full cycle every time for maximum battery life.
NOTE: 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.
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 charging non-NiMH batteries include
destruction of property or fire.
During the charge cycle, the red LED on top of the Listen product will flash slowly. When
charging is completed, the LED will turn off. It is not necessary to unplug the charger; however,
if you unplug the unit from the charger and then plug it back in, it will begin the 13-hour charge
cycle over again.
When not using the LR-400, it is recommended to leave the unit on the charger. The charger
provides a "maintenance" charge that keeps the battery at 100%. If the unit is not on the
charger, the battery will lose up to 20% of its charge
per month.
NOTE: Listen provides high performance constant current NiMH (Nickel Metal Hydride) batteries.
These may be purchased from your Listen dealer (ask for part number LA-362).
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Connect LA-202 here and plug into an
AC wall outlet