UniData Communication Systems WPU-7700 Enterprise Edition User Manual page 57

Battery Keeps turn-off and Lamp on the charger flickers, check the following:
The battery is full, but the phone
keeps turn-off?
Lamp on the charger flickers?
DO NOT USE chemicals
detergent when you clean an alien
substance on a phone or charger.
Cleans it out of an eraser or a soft
patch only.
Separates the battery from the phone, and then, re-fits into the
phone and turns it on. It still turn-off? Then, cleans a contact
terminal, re-fits into the phone and turns it on.
Separates the battery from the charger, and then, re-fits into the
charger. It still flickering? Then, cleans a charging terminal and
charges the battery. (When the lamp doesn't stop flickering, apply
to the service center.)
or Clean Battery procedures
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