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Panasonic cordless phone shows charging but actually it's discharging

I have the set of 5 Panasonic cordless phone. The problem I face is very strange.

On some of the battery charging points, the phone shows charging on display but actually it's not charging. What can be wrong? The battery charging point is Panasonic PNLC1050.

It looks like that some of the battery charging points are not able to charge the phone (if charge is low), though the phone says charging on display. The same phone gets charged on other battery points. For me, the phones charge only on 2 of the 5 battery charging points I have. Infact the strange thing I find is that if the charge in phone is low, then it doesn't charge at all, though the phone screen says charging. After 36 hours or so, the phone loses all charge even when it was on faulty battery charging points all along.

What can I do to solve the problem? Why would a battery charging point not charge my Panasonic phone though it shows its charging?

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I'd like to add that I've experienced this same problem. The entire set was stored in box for 2 years after using it for about 3 years. When setup again, I found that I could only charge handsets on the base station and none of the three remote chargers would work. It would show "CHARGING" status for 2 or more days and then the batteries would go dead. Purchased new batteries and same.

Purchased a replacement charger and cradle from Panasonic ($30!) and that one works.

I suspected a problem with the cradles, but never believe that all 3 could have gone bad. Now I'll have to investigate them more carefully.

Hi There Folks! I have a set of Panasonic Phones as well, not sure what the model # is. However, I just purchased new batteries too, with no charging happening. What they are doing however is beeping, beep - beep - beep - it never stops....I unplugged the phone and plugged it back in, made no difference both phones are beeping. I have a 3 phone set- but lost one of them so I have the master one and one satellite. Is the Diode Issue a possible cause of this as well? They have been charging for more than 24 hours and only have 1 bar.

Thanks in advance for your help - I do think, but I will double check when I get home to make sure I ordered the correct batteries, I just reordered ones I had ordered before - so I didn't even look; but they are the yellow/goldenrod colored Panasonic batteries.

Again - thank you for any assistance provided - I appreciate it.

PS - if you can - can you send a photo of where that diode is? I can try that route to see if it makes any difference, but I did not notice anyone mentioning the beepbeepbeep! Thank you.

I just ordered new batteries for my Panasonic KX-TG6581. This cordless phone has been in a box since it was last used - in 2013. The new batteries not only would not charge, but appeared to lose some of the charge they shipped with. After several hours of no progress, I sprayed all the terminals with Dust Buster - even though everything appeared pretty clean. Guess what? Everything is charging just fine! Problem solved!

Hi im first time use the cordless phone. I have been charging the cordless for 10hr but the cordless cannot on...but it show charging

One of my cordless phones went completely dead after being off the base. I immediately put it on the base but did hear the contact sound. I inserted new batteries and charged on base overnight. Nothing! Phone is abt 6 months old.

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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

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where is that diode?

It's a small black component on the circuit board with 1328 m2s printed on it in tiny print, the diode symbol is just below it. This needs removing from the board and a new one soldering in place, remember it will only work the correct way round

If the location of the diode on the hand set or the cradle?

It's in the the cradle, undo two cross-head screws and pull the base off. It's a small circuit board-there's not much to it.

David is a genius! I had two bad handsets and bought new rechargeable batteries and another AC charger at a junk store (but not the base). Then I found this and replaced those diodes. All good now!

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I don't know enough to replace diodes or repair my phone or base. I have the same symptoms of the original poster. Is it more likely the problem is with the handset or base? I'll just replace the culprit.

Thanks

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It's the base (cradle):

Is the location of the diode on the hand set or the cradle?

09/29/2017 by Rf Hu

It's in the the cradle, undo two cross-head screws and pull the base off. It's a small circuit board-there's not much to it.

10/03/2017 by David

Handset and base phone have massage "insert battery". I charged battery from external charger, but I got same massages. Can somebody give me advise that I have to do?

Regards,

Lev

Hi I too have a Panasonic cordless phone. Mine is a duo set with no base charger they both have separate cradles. Over the past 6 months one of the handsets has started to act up I have had them nearly 4 years and since replace both sets of batteries. The handset is charging up but then going completely dead. I thought it was again the batteries but when testing the batteries they show full power but the handset seems to think they are depleted/dead. I know about electronics but I don't want to mess about with anything in case I damage them. What should I do.

@thgun03 - your batteries can't maintain charge, so why are you worried about damaging something that doesn't work?! Get a new base or follow the correct advice about replacing the diode.

"insert battery" means that your Panasonic phone is looking for genuine Panasonic batteries -- it's rejecting the generic no-name batteries that you're trying to use... proprietary voo doo!

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There are 3 possibilities - bad batteries, bad charging base, bad contacts. It's clear that bad charging base (defective diode) has happened to a number of people and is probably the main reason people come here (after all, you will have replaced the batteries before you get to this topic). Why not just close this topic - it's been solved!

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Hi there. I too have had problems with my Panasonic cordless handset, especially the one connected to the base station. Mine doesn't have a base station dock like the model before it there both cradle docks. I bought them nearly 5 years ago. I have replaced tbe batteries twice and a few months ago I noticed my handset was losing it's charge pretty quick, and I had noticed it did not always beep when the handset was put in the cradle. These batteries are new, so it did its charge. I removed the handset from the cradle and powered it on, it came on then an hour later it was dead. I tried to power it on but it would not switch on. I took out the batteries and reinserted them and they were showing fully charged when it switched on but then a few seconds later it died again. I'm hoping its just a charging issue, and if so I can charge up the batteries in a generic charger. I have also used some compressed air spray on the connections as suggested by another person and it has made tbe contacts more remsponsive. Fingers crossed this solves the issue.

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