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?

Contestado! View the answer Yo también tengo este problema

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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.

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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.

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Hi,

How old are the batteries?

The phone could say that they are charging, as long as the voltage/current from the charger is the correct value.

If the batteries are old they could be failing to hold their charge.

Even rechargeable batteries have a life span. (the average life is around 500 charge / discharge cycles)

Try replacing the 2 batteries with new ones, in just the one phone to see if this resolves the problem. (Allow them to fully charge before first use) They are not that expensive.

The batteries that are required are Ni-MH 1.2V AAA (R03) size.

Here is an image taken from the User guide that shows how to replace the batteries.

Block Image

(click on image to enlarge for better viewing)

Here is a link to a supplier. It is not a recommendation to use them, it is shown to give you an idea of the cost of the batteries. There are plenty of other suppliers available for you to choose from.

Update (03/19/2017)

Hi,

Is there enough contact spring tension being placed by the charger connectors onto the phone charge connectors?

With the power disconnected from the charger you may be able to feel the tension in the charger connectors by gently pressing down on them with a wooden toothpick or other similar probe that fits. Check if there is a difference in the spring tension between the chargers that work and those that don't

Are the charger connectors, clean and shiny (this should ensure a low resistance connection)?

Are the phone charge connectors also clean and shiny (for the same reason as above)?

It may be that if there is not enough contact pressure or there is resistance in the connection between the phone and charger that the phone may intermittently not charge.

As you say that they are new, if all else fails, verify the purchase date on the sales receipt or proof of purchase document and if the date is still within the manufacturer's warranty period. then consult the manufacturer's warranty statement in the User Guide as to what to do to make a claim for a manufacturer's warranty repair or replacement.

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No, the problem is not with batteries. The batteries and phone both are new. I have changed batteries aswell but that has had no affect.

After observing the problem for a while now, I am sure problem is not with batteries. The same phone gets charged with another set of battery charger.

Out of 5 battery charging points, 3 are giving problem. As mentioned, the phone shows charging when docked in these 3 battery charging points but actually they are not charging and after being on the dock for 48 to 72 hours, the phone loses all the charge and shuts off.

However, I don't face the problem of charging the same phone on 2 of the battery charging points.

I am wondering what could be happening on these 3 battery charging points that phone shows charging but actually it isn't charging.

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Respuesta Más Útil

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?

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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

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

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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.

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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

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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

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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.

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@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.

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

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