Tip & How-To about Panasonic KX TGA400B Cordless Expansion Handset
The NiMH batteries used in these phones have a useful life of about 2 years. With only 2.4v at normal operation, the amplifier circuit will start to pick up interference as the voltage drops in an old battery. If you hear a constant buzzing, no matter your location or distance from the base unit, then it's most likely your battery causing the problem. Some phones are more susceptible than others causing the buzzing to start earlier than another phone. Battery Buzz is a good indication to change your battery as soon as possible. As the problem gets worse you will have voice and connection problems. Since transmitting uses the most power, you will be unaware when your voice quality drops dramatically for the people on the other end of the call.
Posted by Ben Jordan on
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