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ezguru
2 of my golf cart batteries are 11 years old which i revived with epsom salts and a desulfator,

I replaced the acid in my batteries with distilled water and dissolved epsom salt and left the charger on for two days. Flushed all that out then Then I desulfated the batteries for a week and now the hydrometer
reads 1.300 about like new batteries.. I could see progress everyday with the desulfator running..

please feel free to email me if you have questions
HotRodCarts
Let us know how the batteries are holding up a month or two from now. My guess is you'll be buying new batteries... twocents.gif
Gale Hawkins
It will be interesting to see how your chemical/electrical approach works. Do keep us updated.

Did you get any solids out when you turned them upside down and flushed?

We just got the BatteryMINDer-36-Volt-27-Amp-Charger-Maintainer-Desulfator since I have had great success using desulfators on 12v batteries. Hopefully it will warm up some this weeked so we can get the cart out but our batteries are just a little over 4 years old.

ezguru
yes stuff came out when i flushed them,, I took a high pressure washer and blasted them
out.. as of now the 11 year old batteries are doing fine. i will keep u posted..
ezguru
test
HotRodCarts
1 2 3
dirtysouth
rotflmao.gif
Gale Hawkins
What desulfator did you use? Did you try it before going the chemical route?
shook
Can the Battery Minder be used in place of the charger? good bad? How long would it take to charge says it 70% faster?
HotRodCarts
No you need a 15-20+ amp charger to properly charge golf cart batteries.
Gale Hawkins
I need to check out the charger that came with our 2007 EZGO PDS cart. On the back it is labeled 36v 21a which I took to mean it was a 21 amp charger but even after a two hour ride it will only pop to 12 amp for a couple minutes then settle on 10 amps for a while then taper to zero which has taken 16 hours to do the automatic shutdown so I think it is getting the batteries fully charged.

The batterminder 36271 will do its full charging thing after the EZGO charger has shut off then just go into float mode which leads me to think the that bank is getting fully charged. The volt meter supports that but I have not pulled SG readings yet but I did buy some more cheap testers so I have one just for the cart.
Gale Hawkins
http://www.patentstorm.us/patents/5652497/description.html

ezguru this is an interesting take on desulfation. I see China is making chargers based on the second half of this patent.

If it works just using a battery charger to get 5x the normal life of a deep cycle battery that would be a hit. I did see a battery with posts that can switch polarity by the user.

What they talk about for electrical vehicles is interesting. It was some posts in the off grid forums where I first heard of polarity reversing. I know it is not as easy as it sounds to discharge a 12 volt battery down to .5 volts.

Are your cart batteries still looking good after the treatment and starting to use the BatteryMINDer?
ezguru
QUOTE (Gale Hawkins @ February 23, 2011 - 08:24 PM)
http://www.patentstorm.us/patents/5652497/description.html

ezguru this is an interesting take on desulfation. I see China is making chargers based on the second half of this patent.

If it works just using a battery charger to get 5x the normal life of a deep cycle battery that would be a hit. I did see a battery with posts that can switch polarity by the user.

What they talk about for electrical vehicles is interesting. It was some posts in the off grid forums where I first heard of polarity reversing. I know it is not as easy as it sounds to discharge a 12 volt battery down to .5 volts.

Are your cart batteries still looking good after the treatment and starting to use the BatteryMINDer?

Im not familiar with polarity reversing,, never heard of it,, yes my 11 year old golf cart batteries
are doing fine,, last saturday 36 holes no problems. Im now giving my 2008 batteries the same
treatment.. its amazing how much gunk comes out of a battery when you flush it out...
Gale Hawkins
I just found the patent info last night and it gave enough info to kind of feel my way forward. If one plans to try and follow that outline they should read and understand every warning because it pushing me to my limits on this first battery. Just got back from WM buying another headlight to help with the discharging.

It seems like it will take 24 hours after getting the battery down to about 4 volts and bolting a cable between + and - posts to get the battery to discharge down to under 1 volt. The warning about the burn off going into run away mode is NO joke. Since you have to do it with the caps off one needs to make sure they have a lot of distilled water on hand and a turkey baster to help keep the plates covered and the cooling working well.

It is about 50 outside where I am working and I wish it was 32 like last night. There is no question the gray build up on the plates is going some where. It is to go back into solution per the article for the most part.

That is good news about your desulfating success. I started to do your process and the BatteryMINDer thing than got the wild haired idea to try the reverse polarity thing on this very damaged old set. Hopefully I will know something by Monday.
Gale Hawkins
While I just started in the polarity reversing project I have noticed one thing. There was space between the plates and insulation because in places can see down between them. They were all crammed together before when the + post was the + post. Now that the + post is becoming the - post the space is starting to open up.
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