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Unread 08-28-2009, 10:34 AM   #1
Not Yet Wild
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Default needs DS 36v battery help

I have a newly purchased cart. a 1991 Club Car DS my first cart. The charger will run for 20+ hours and not shut off. This morning it boiled a lot of acid out of the batteries.

It is a Lister Charger and these are the reading I have from the batteries after the charge ( i pulled the plug after 20 hours) The batteries were all at a "rolling boil" when I unplugged it. I let it sit 2 hours and the following readings were taken.

bat 1 1.275, 1.275, 1.275 6.32 volt
bat 2 1.275, 1.275, 1.250 6.22 volt
bat 3 1.250, 1.250, 1.250 6.33 volt
bat 4 1.250, 1.210, 1.275 6.30 volt
bat 5 1.210, 1.275, 1.275 6.30 volt
bat 6 1.262, 1.250, 1.250 6.34 volt

I am trying to decide if I need to go get new batteries or if possible the charger is bad. Any suggestions would be greatly appreciated.

thanks
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Unread 08-28-2009, 10:41 AM   #2
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Default Re: needs DS 36v battery help

After 20 hours all batteries shoould be about 6.4 Test specific gravity with a hydrometer to find the weak cells? I think your batteries are bad?
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Unread 08-28-2009, 10:53 AM   #3
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Default Re: needs DS 36v battery help

The voltage and specific gravity of each cell was listed. None are too bad but I assume a bad cell will keep the charger going forwever.
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Unread 08-28-2009, 11:05 AM   #4
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Default Re: needs DS 36v battery help

Yes, sorry I didn't see that funny the lowest cell is not on the weakest battery? I like to load test. Harbor Freight has a cheapy for $25 ... How long after you turned off the charger did you take these readings? You might take the voltage again and see if it dropped?
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Unread 08-28-2009, 11:18 AM   #5
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Default Re: needs DS 36v battery help

Scotty, go back and read the first post, ya goof!
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Unread 08-28-2009, 11:21 AM   #6
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Default Re: needs DS 36v battery help

Quote:
Originally Posted by gornoman View Post
Scotty, go back and read the first post, ya goof!
Aw Geez More Coffee! Please. Now I gotta start reading posts before I reply to them ??? Sheez. Not used to people putting all the correct info up
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Unread 08-28-2009, 11:29 AM   #7
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Default Re: needs DS 36v battery help

so am I looking at buying new batteries today? My gut is telling me that they are on the way out. My biggest concern is the charger run time. I am hoping new batteries will let the charger shut off. It makes me a bit nervous with this cart in the garage with the other toys. I dont want a cart to burn down my toy box.
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Unread 08-28-2009, 11:34 AM   #8
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Default Re: needs DS 36v battery help

Here's a state of charge chart to help with your analysis

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Unread 08-28-2009, 11:39 AM   #9
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Default Re: needs DS 36v battery help

FM Jeff,

My 36V charger, with new batteries, runs between 8-10 hours. Never any longer than that. The charger is an oldie (the original provided with the Club Car) and still works great.

If your charger is running for 20+ hours, it is most likely because of bad batteries.
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Unread 08-28-2009, 11:42 AM   #10
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Default Re: needs DS 36v battery help

i was using the stickey chart after the test. I just dont know enough about deep cycle batteries to determine to keep the batts or replace them. Looking for an expert opinion.

20 hours of charging, some melted posts on the batts Not from the charging (theyhave been re tapped) and the charger not turning off has me baffled.

If it was your cart what would you do? Replace the batts or just keep rolling?

It is a neighborhood cart only so the most use it will see is 20 minutes at a time, maybe an hour total use a day on a really big weekend day.
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