Help needed on rechargeable 3D glasses for Panasonic TV

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richms

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Reply # 1206918 1-Jan-2015 17:09

Generally once the over discharge protection on a lithium cell is triggered, there is no way to recharge the pack.

This is a safety feature. This is a lower level than the low battery cut off. If you stored the glasses, and they were flat for a long time it may have self discharged below the threshold to never come back again.

If you can see the bare cell inside, you can possibly directly charge the cell, but depending on how lot it got its capacity may be way down and it might start to puff up indicating that its really stuffed.

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Mspec

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Reply # 1206919 1-Jan-2015 17:18

No you cannot see the bare cell. Getting the full specs for them its a standard 5v charge so its safe to say any cable could be used to charge them. I would say the battery is naffed.
Might be a good oportunity to see if I can take them apart and replace the cell.

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richms

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Reply # 1206925 1-Jan-2015 17:27

Dont replace it when you take it apart, just check its voltage. If its showing no signs of puffyness and is over 2v then I have had good luck on mobiles with just directly charging the cell up enough to get the protection circuit to turn back on. If its down near zero then it wont have any capacity left and will puff up within the first few uses.

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Mspec

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Reply # 1206926 1-Jan-2015 17:33

richms: Dont replace it when you take it apart, just check its voltage. If its showing no signs of puffyness and is over 2v then I have had good luck on mobiles with just directly charging the cell up enough to get the protection circuit to turn back on. If its down near zero then it wont have any capacity left and will puff up within the first few uses.

Cheers will see if I can get it apart later tonight and throw the multi meter on it.

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Mspec

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Reply # 1206932 1-Jan-2015 17:53

Have just taken them apart and it is indeed a stuffed battery , Its already puffed up and reading 0 on the multi meter. No idea how I can replace it though as any markings on it was on the underside and came off when I pried it up (was glued down).

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richms

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Reply # 1206933 1-Jan-2015 17:57

Measure it and browse thry aliexpress till you get one that has the same measurements and will fit.

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richms

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Reply # 1206934 1-Jan-2015 18:00

Actually since I can make out the numbers in the picture, this lot would be it

http://www.aliexpress.com/item/free-shipping-4pcs-lot-3-7V-lithium-polymer-rechargeable-battery-301518-MP3-4-5-Bluetooth-monitoring/32224266456.html

edit: actually I dont know if those have protection circuits on them or not. Best not to replace it with one without them incase this happens again and you try to charge a stuffed battery it might pop open and ruin the glasses totally. Check with the seller first before buying, but the numbers on the cell are the size of it, so you should be able to find one somewhere else if not aliexpress, its just thats where I generally get them from.

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Reply # 1206948 1-Jan-2015 18:07

richms: Actually since I can make out the numbers in the picture, this lot would be it

http://www.aliexpress.com/item/free-shipping-4pcs-lot-3-7V-lithium-polymer-rechargeable-battery-301518-MP3-4-5-Bluetooth-monitoring/32224266456.html

edit: actually I dont know if those have protection circuits on them or not. Best not to replace it with one without them incase this happens again and you try to charge a stuffed battery it might pop open and ruin the glasses totally. Check with the seller first before buying, but the numbers on the cell are the size of it, so you should be able to find one somewhere else if not aliexpress, its just thats where I generally get them from.

Well done that man , that's a pretty good effort being able to make out the markings. Have ordered those ones off of aliexpress and will have to try my steady soldering hand when they turn up.

Thanks for the help very much appreciated.

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Gadgetcity

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Reply # 1206980 1-Jan-2015 20:59

I charge mine every six months or so (they are usually between one quarter and one half full at that time). I also charge them straight after using them (which is incredibly rarely ATM!) That way they don't over discharge, but to answer your original question....

Yes, you can use any micro USB cable and any USB source. I've used PC ports, phone charger, and even the USB port on my WiFi router.

Mspec

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Reply # 1206981 1-Jan-2015 21:25

These ones came with the TV the other pair I have has the coin battery in which in all honesty are easier , you can pickup a pack of 10 batteries for 5 bucks and for the amount of times they get used just seem easier.
But yes once I have a new rechargeable battery in this pair will follow you advice on charging.

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Loismustdye

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Reply # 1207086 2-Jan-2015 09:32

As an option can you use different branded 3D glasses if they are reasonably priced?
We had a 50inch Samsung 3D plasma from 2011 and we can use the glasses that came with that on our new Sony 60w850b LED.
Both sets use active (powered) glasses and work on both.
I remember seeing somewhere that from a certain date manufacturers were making their active glasses to a set standard.

Mspec

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Reply # 1207106 2-Jan-2015 11:00

Yes there are plenty adervtised on ebay and the likes. For a few bucks if I just replace the battery in this pair I should be good to go. Will probably be another 12 months before they get used.
I purchased the TV for the picture quality (Panasonic TH-P55VT50Z) and not the 3D.

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