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5 yr old LiPo battery charging issue - 12/13/2012 3:52 PM   
MMatheny


 

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From: Dickinson, TX, USA
Status: offline 		I bought an Air Thunder 3s 2200mAh battery around 5 years ago, didn't get much use but I did pull it out every once in a while to discharge and charge it. Well, year or so ago I got a plane that I could use this battery for. Worked great and then lately last several times I tried to charge it using my BC-6 (real, not clone) charger, the first cell detected voltage jumps all over the place, and it eventually errors out. Testing with a cell voltage tester the voltage is solid! Even my amp/voltage meter shows solid full voltage charge! Another Turnigy 2200mAh charges fine, so I don't think it's the charger or cable.

Any ideas? I haven't had a chance to test run it to see if it loses power quickly. Might do that and also hook the ammeter in line to see what it shows.

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RE: 5 yr old LiPo battery charging issue - 12/13/2012 4:18 PM   
t9dragon



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Status: offline 		The battery probably has gone bad.

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RE: 5 yr old LiPo battery charging issue - 12/13/2012 4:57 PM   
allelectric


 

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Status: offline 		Sounds like the battery. I wouldn't fly it in any of my planes. Any physical changes puffing,
loose connection at the balance.plug?

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RE: 5 yr old LiPo battery charging issue - 12/13/2012 6:26 PM   
opjose



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Status: offline 		The voltage checker is probably not putting a load on the pack, so you are not getting anything meaningful back.

The better charges check the state of the packs and what happens under load, so I would put more trust in your charger.

It sounds like a cell went bad.





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RE: 5 yr old LiPo battery charging issue - 12/14/2012 1:10 AM   
guver


 

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Status: offline 		It could be either of those things, my best guess is that your cell#1's balance wire has a bad connection where it's soldered to the cell tab. I think it HAS to pin 4 and not pin 3. Isn't pin 3 shared by two cells?

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RE: 5 yr old LiPo battery charging issue - 12/14/2012 3:07 PM   
MMatheny


 

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Status: offline 		No puffing - but that was Air Thunder's claim to fame for charging what they do! Guess a new battery is in order. Thanx for the inputs guys.

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RE: 5 yr old LiPo battery charging issue - 12/14/2012 3:08 PM   
MMatheny


 

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quote:

ORIGINAL: guver

It could be either of those things, my best guess is that your cell#1's balance wire has a bad connection where it's soldered to the cell tab. I think it HAS to pin 4 and not pin 3. Isn't pin 3 shared by two cells?

I guess I could try wiggling the balance cable around just for grins.

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RE: 5 yr old LiPo battery charging issue - 12/14/2012 10:26 PM   
guver


 

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Status: offline 		Yea, do it during the charge or discharge.

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