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Old 26-08-2008
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Default cell resurrection

Hi i bought some orion intellect 4200's second hand and they seem dead and jus wandered if there is anyway to bring them back to life all but one of the cells voltage in the pack is below 0.9 volts and overall its about 1.3 v for the whole pack is there anything i can do or shall i jus get my money back for them ? any help is much appreciated . jono
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Old 26-08-2008
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try what Legend did in post 4 in this thread
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Old 26-08-2008
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cheers by flashing do you mean jus passing 12v across each cell briefly like for a second or 2 ?
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Old 26-08-2008
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Ive just done mine, retested with a multimeter and they are now charging

Literally tap it on and off, don't hold it on, thats it. Mine shot up from 0.0v to 1.3v.

Now i just have to get up the balls to do it on my 4200's without blowing my hand off
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Old 26-08-2008
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cheers will give it a try later hope they dont blow up in my face lol
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Old 26-08-2008
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Yeah i looked away and closed my eyes

They've just charged up to 5100mah
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Old 26-08-2008
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This will work if there is a 'soft' short within the cell, this occurs when dendrites grow on one electrode, pierce the separator and short against the other electrode, effectively short circuiting the cell. Applying 12V at very high current through the soft short burns it away and the cell usually works again… The trouble is that it can sometimes locally melt the separator and makes the cell prone to further internal short circuits which could pose a safety risk

Do this at your own risk!
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Old 26-08-2008
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Quote:
Originally Posted by neiloliver View Post
The trouble is that it can sometimes locally melt the separator and makes the cell prone to further internal short circuits which could pose a safety risk

Do this at your own risk!
ANd they say Lipo's are dangerours!
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Old 28-08-2008
neiloliver neiloliver is offline
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All batteries can be made to be dangerous under the wrong conditions.
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