Listen Technologies LA-321 - Manual (Page 29)

25
Information
NiMH Battery Technology
Listen LA-362 NiMH batteries are industrial grade and provide constant current
to Listen products. These batteries provide 2000 milliamp hours (mAh) of storage
capacity. When used with Listen supplied batteries, Listen products should provide
the following operational time after batteries are fully charged:
Receivers: 15 hours
Transmitters: 8 hours
Listen recommends that new batteries be put through two-charge cycles prior
to use.
Nickel Metal Hydride (NiMH) batteries have no memory effect, so each charge
offers full recharge capacity.
NiMH batteries can be repeatedly charged to full capacity from any level of
capacity. NiMH batteries typically maintain optimal performance for 500 to 700
charge cycles. Listen recommends that batteries be replaced after 2 years of
service or whenever the batteries no longer hold a charge.
Please note that NiMH batteries should be recharged if they have been sitting idle
for more than two months, as they lose around 20-30% of their charge each month.
To avoid battery discharge while not using Listen products, it is recommended to
leave units in a powered case, as the maintenance charge will ensure the batteries
remain at full charge. Make sure the case lid remains open or removed. The
charging process generates heat and ventilation is required.
LED Indicators
Portable Receivers (LR-300, LR-400, LR-500)
Red LED
Continuous ON Unit is operating
Slow flash Batteries are low
Slow flash while charging Charging in progress
Portable Transmitters (LT-700)
Red LED
Continuous ON Unit is operating
Slow flash Batteries are low
Slow flash while charging Charging in progress
Fast flash Audio mute is active
Charging/Carrying Cases (LA-311, LA-317, LA-321, LA-323, LA-324, LA-325)
Green LED
Continuous ON Power to case
Continuous OFF No power to case