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Unread 07-10-2008, 08:48 AM   #1
Not Yet Wild
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Default 48V battery question

What would you do with this situation? Tested batteries with floating balls hydrometer and got: 4-4-4-4,4-4-4-4,2-4-4-4,2-4-4-4,3-3-4-3,and 1-4-4-0.
All tested at least 8V with multimeter. All six tested about 50V. Obviously (to me) one battery is shot. Try to replace that one or what? I tried pouring in Battery Equaliser (1.75 oz) into all cells that didn't float 4 balls. It did help the one that now floats 3-3-4-3 but not the one with the dead cell.
Thanks for any suggestions.
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Unread 07-10-2008, 09:00 AM   #2
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Default Re: 48V battery question

Generally. I would say it is time for new batteries. Battery additives and such do not work well in the long run. The #2 cells are not good either. You have two gd. batteries. U can try a 12v charger on the weak ones to see if u can bring them back up with a hot charge (doubtful but worth a try) or....u can try to find 4 gd. used? OR take Roady's advice below Good Luck
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Unread 07-10-2008, 09:00 AM   #3
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Default Re: 48V battery question

For the battery eqaulizer to work you will have to cycle the batteries several times. You just can't pour it in and expect it to work. I use this stuff and it works great. It doesn't tell you that on the bottle. It is a temp fix at best ....but I have one battery thats been going for a year now by using the battery equaliser. It was completely dead before I used it.
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Unread 07-10-2008, 09:04 AM   #4
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Default Re: 48V battery question

Quote:
Originally Posted by roady89 View Post
For the battery eqaulizer to work you will have to cycle the batteries several times. You just can't pour it in and expect it to work. I use this stuff and it works great. It doesn't tell you that on the bottle. It is a temp fix at best ....but I have one battery thats been going for a year now by using the battery equaliser. It was completely dead before I used it.
wow
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Unread 07-10-2008, 09:04 AM   #5
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Default Re: 48V battery question

Thanks for the suggestions. I did go through about four charging cycles but I knew up front that it doesn't do magic on a bad battery. I will try to bring up the weaker ones with a 12V charge. Like you say, it's worth a try.
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Unread 07-10-2008, 09:19 AM   #6
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Default Re: 48V battery question

12V charger cut out in less than a minute on all four questionable batteries.
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Unread 07-10-2008, 09:32 AM   #7
nimda
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Default Re: 48V battery question

This battery that I have was a 12 volt battery. I let it boil on a high amp charge for about an hour. After that I was good to go.
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