1 bad cell spoils them all? 12V deep cycle

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LarenC

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Aug 14, 2018
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I have a SRM-24 Interstate deep cycle battery that shows me one cell is dead while the other 5 are just fine. Is there any way to revive that dead cell?
 

LarenC

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Aug 14, 2018
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So, refilling it with epsom salt & distilled water and doing an "equalization" on it won't help?
 

Lou Schneider

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Usually a cell dies when enough debris flakes off of the plates to short out the bottom of the cell. The cell quickly discharges itself through the short, giving the dead reading.

An equalization charge ensures all cells have a chance to reach a full charge.  It won't do any good if the bad cell is shorted and discharging itself.  Epsom salts or other additives can dissolve hard oxidation deposits that reduce a cell's capacity.  But oxidation usually affects all cells fairly equally, if only one cell is dead while all the others show a full charge, the bad cell is shorted, not oxidized.

I'd bite the bullet and just get a new battery.  Trade in the old one for the core credit and it will be properly recycled, not thrown into a landfill.
 

solarman

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Feb 8, 2018
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LarenC said:
So, refilling it with epsom salt & distilled water and doing an "equalization" on it won't help?

no, just pure BS, you have a boat anchor, get a new one.
 

Arch Hoagland

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Clovis California
LarenC said:
I have a SRM-24 Interstate deep cycle battery that shows me one cell is dead while the other 5 are just fine. Is there any way to revive that dead cell?


Put your left hand on it, raise your right hand and say "Heal brother, Heal."

Then go buy a new battery after taking a picture of how they are connected.
 

Lou Schneider

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No thanks, I guess I'm just a wimp.  Messing around with toxic lead plates and caustic electrolyte isn't my idea of fun.  Just buy a new battery and let the experts deal with that mess.
 

QZ

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Jul 17, 2017
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556
If the gravity is flat dead in one cell is probably all done. If it's just lower than the others the most I would do is an equalizing. Even if it did recover I might not have much faith in it.  If a battery has some variation in cells it's normal to equalize but not often helpful if just one is a lot different. If you have room you may even want to move up to a 27 29 or 31 if you need the capacity. If you are always or mostly plugged in that's not an issue
 

Frank B

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Apr 23, 2005
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Calgary, Alberta
And then, of course, there is the question of the age of the battery. If it is a few years old, then even if you could fix one cell, the others are probably not far behind.
 
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