"Panasonic cordless phone shows charging but actually it's discharging"に関する回答Remove the single screw from the base unit. Pry the base open. Inside there is a circuit board, on it is a small black component (a magnifying glass will help) there is a small diode symbol on the board next to it. Using a soldering iron, melt the solder holding the diode and remove it from the board. Get a new diode (ebay?) and solder it in place of the old one ( it must go the correct way round). It doesn't have to look pretty, so long as the connections are ok. - That is it.
"Panasonic cordless phone shows charging but actually it's discharging"に関する回答There is a diode on the circuit board, if this is faulty the phone will show to be charging- but the charger will actually drain the hand-set batteries. I de-soldered this off the board and re-placed with a small diode off a defunkt circuit board that I happened to have, any small value diode should fix this. The old diode must be removed. Mine now works fine. -David