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Old Apr 24, 2011, 11:47 AM
Registered User
India
Joined Oct 2010
92 Posts
Help!
New 2s lipo batteries un balanced

Hello guys I have recently got into electrics & have received a new batch of 2s Rhino lipos from hobby king. All of the packs are balanced & more ever have a difference of 0.1-0.2 volts between cells but one of them has one cell at 3.04 volts while the other at 3.88 volts as per to my multi meter & cell pro multi four. what should I do keep it & just balance charge it or send back?
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Old Apr 24, 2011, 11:57 AM
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Mark Wood's Avatar
United States, CA, Bear Valley Springs
Joined Feb 2000
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Give it a couple of balance charges keeping a close eye on it and give it a chance. If it doesn't straighten up by then you likely have a duff cell.

mw
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Old Apr 24, 2011, 12:07 PM
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
21,034 Posts
I'd charge the low cell as a 1s through the balance lead up to 3.85V
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Old Apr 24, 2011, 03:31 PM
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India
Joined Oct 2010
92 Posts
I have started to charge the pack using safe balanced charge preset setup in multifour its yet to charge the pack to full but there is still a difference in the cells charge 1 no is at 3.89 volts while the 2 no is at 4.18 I ll wait for the process to get over & then see if not well balanced then try to balance it using a balancer to get them match up. & keep a close eye on them. I have also shot a mail to hobby king as their warrenty does take time so lets see. Hopy thanks for your idea I ll keep it my mind for the next time I feel it will save me some time.
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Old Apr 24, 2011, 03:44 PM
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Haralson County GA. USA
Joined Oct 2004
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Single cell charging adapter comes in handy with such badly balanced packs.


http://www.rcgroups.com/forums/attac...7&d=1297609335


Charles
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Old Apr 25, 2011, 05:38 PM
That's a funny word
NE Ohio
Joined Apr 2003
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Quote:
Originally Posted by everydayflyer View Post
Single cell charging adapter comes in handy with such badly balanced packs.


http://www.rcgroups.com/forums/attac...7&d=1297609335


Charles
Where can I buy them?(the single cell adapter) thanks.
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Old Apr 25, 2011, 06:17 PM
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So. Cal.
Joined Oct 2004
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Single cell adapters can be easily fabricated from .100" spacing header pins that are widely available from almost any electronics store. Servo extensions also work well if you simply remove the protective shroud.

If you can't easily locate a source, shoot me a PM and I'll dig one up and send for the price of postage and an envelope.

Have not personally seen premade single cell adapters.

Mark
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Old Apr 25, 2011, 06:29 PM
That's a funny word
NE Ohio
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Thanks, I may try radio shack.
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Old Apr 25, 2011, 06:37 PM
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Can also be salvaged from old computer parts as most PC connections use .100" spacing headers.

Mark
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Old Apr 25, 2011, 11:44 PM
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United States, FL, Maitland
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yeah any case fan header will work perfectly
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Old Apr 26, 2011, 12:53 AM
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India
Joined Oct 2010
92 Posts
I have made mine using a 6inches long 22awg wires & just soldering the ends. worked perfectly.
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