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Reviving A Dead Battery


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#1 Kyocum OFFLINE  

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Posted June 04, 2012 - 09:14 AM

I am not sure if this is the right area to post this so if it is in the wrong location please move. I did a little experimenting with a dead battery yesterday and the results today are well all I can say is wow. I used a Epsom salt and water solution. This battery I could short across the terminals and get not even a trace of spark. I drained the cells down to the plates and topped them back off with my Epsom salt solution and put the battery on a slow charge for 24 hrs. The arrow on the hydrometer didn't even move on the initial check. Barely got a 1.120 reading after being on the charger and now all the cells read between 1.1275 to 1.1285 on the hydrometer. I am pretty stoked to say the least. Do not know how long it will last but if it saves me from buying a battery for a few months I will be happy. Epsom salt $3 a new battery $50
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#2 HDWildBill OFFLINE  

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Posted June 04, 2012 - 09:35 AM

Keep us posted on how this works.

#3 JDBrian OFFLINE  

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Posted June 04, 2012 - 10:33 AM

Interesting info. It seems that that would dilute the acid but may be causing some other reaction that is reversing deterioration in the battery! I second Bills comment on keeping us posted.

#4 MH81 ONLINE  

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Posted June 04, 2012 - 11:24 AM

I have had mixed results on this. On the oldest battery I tried it on (about 10 yrs old, not used in 7), it's working great almost a year later. On the newest one that I tried it on, it still wouldn't take more than about 8 volts... ended up as a core for a replacement.

Hope yours hold up well.

#5 grand OFFLINE  

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Posted June 04, 2012 - 11:28 AM

Thanks for the tip Kelly. I may be giving that a try. What was the ratio of Epsom salt to water that you used ?

#6 Kyocum OFFLINE  

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Posted June 04, 2012 - 11:35 AM

Thanks for the tip Kelly. I may be giving that a try. What was the ratio of Epsom salt to water that you used ?


Grand I used 3 heaping tablespoons per cup of water. The youtube video I watched called for distilled water but I wasn't going to run back into town for a qt of distilled water so I just used well water. That battery spins that tractor motor over with ease.
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#7 KennyP ONLINE  

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Posted June 04, 2012 - 02:40 PM

I have one I'm going to try this on. It hold about 3 volts. Maybe I can bring it back for a bit!

#8 Texas Deere and Horse ONLINE  

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Posted June 04, 2012 - 02:53 PM

I do this to every older battery I own. Here is the thread I started back in Feb. 2011 and had several comments on the subject. You might want to read what everyone had to say then.

http://gardentractor...battery-repair/

#9 HDWildBill OFFLINE  

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Posted June 04, 2012 - 03:26 PM

I do this to every older battery I own. Here is the thread I started back in Feb. 2011 and had several comments on the subject. You might want to read what everyone had to say then.

http://gardentractor...battery-repair/


Brian are you still using the batteries that you revived from last year? I just got a tractor in and the guy brought two batteries and said he thought both are dead. I may try this on them and see what happens.

#10 KennyP ONLINE  

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Posted June 04, 2012 - 03:33 PM

Brian, I tried this once before. I just drained this battery and it had lots of black looking stuff coming out of it. It's taking a good charge right now on 2 amps!

#11 Texas Deere and Horse ONLINE  

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Posted June 04, 2012 - 03:39 PM

Brian are you still using the batteries that you revived from last year? I just got a tractor in and the guy brought two batteries and said he thought both are dead. I may try this on them and see what happens.


Bil I have 2 of the 4 battery's I did to begin with are up and still running, #3 last about 1 year and the other 1 didn't ever really take a charge. Maybe the 4th one had a mechanical short in it.


Brian, I tried this once before. I just drained this battery and it had lots of black looking stuff coming out of it. It's taking a good charge right now on 2 amps!


Kenny, The black stuff, is that out of the one you did last year? I have seen that in mine and I think it is the by-product of doing this to them.

#12 KennyP ONLINE  

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Posted June 04, 2012 - 04:45 PM

Sure is, Brian! But it's taking a charge of sorts. I'll know more tomorrow!

#13 HDWildBill OFFLINE  

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Posted June 04, 2012 - 08:13 PM

50% isn't bad Brian. If you can make it last another year or so then that is $50 or so you can use for something else.

#14 HALFSCALE OFFLINE  

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Posted June 05, 2012 - 02:30 AM

Grand I used 3 heaping tablespoons per cup of water. The youtube video I watched called for distilled water but I wasn't going to run back into town for a qt of distilled water so I just used well water. That battery spins that tractor motor over with ease.

You really should use distilled water, you will get even better results, the different minerals in water will give different results

#15 IamSherwood OFFLINE  

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Posted June 05, 2012 - 06:10 AM

I just bumped into this thread. I've been trying to revive 2 8D's, by shocking them with 200amps, then draining
them down with a load tester. After letting them cool, trickling them. Not having much luck. These batteries
have been sitting 3 years.
Going to give the Epson salt a try.




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