Battery charger question

Newbylee · 09-11-2010, 12:34 PM

I installed some rebuilt 6V batts in my cart earlier this year.They still work fine but because we would only use it for short trips around the farm, I wasn't plugging in the charger every day.At first when I'd plug it in at nite the charger was off the next day. Now when I plug in the charger overnite it is still charging in the morning and the charger itself is very hot. Should I leave it on and let it shut of by itself still?
Right now the batts read 34.7V. and it still pulls fine.
any thoughts?

scottyb · 09-11-2010, 12:37 PM

Likely you have one bad battery...... S/G and voltage checks will confirm ~ I suspect. Typical for recons

Better get it fixed before you do any controller damage running it at low amperage.

Newbylee · 09-11-2010, 12:42 PM

thanks for the quick reply Scotty. I'll check the voltage on all the batts.
whats S/G?

scottyb · 09-11-2010, 12:48 PM

Specific Gravity. Test done with a simple hydrometer bought from auto parts store. (not the kind with balls for antifreeze) But the temp compensating type for batteries. Any way they tell lots more than voltage as you get the true health or activity in each cell. One weak cell in one battery will cause the trouble you describe. My guess is one of your batteries is 4 volts anyway. LOL

You are down 2 volts = you lost a cell.

golfcarfixer · 09-11-2010, 12:50 PM

What are rebuilt batteries? and how do they do it?

scottyb · 09-11-2010, 12:54 PM

Quote:

Originally Posted by golfcarfixer

What are rebuilt batteries? and how do they do it?

OH.... you know

Dump the water out and put in fresh electrolyte and put em on a big charger for a week

Newbylee · 09-11-2010, 12:57 PM

Each battery measures 5.79 to 5.82 V. I'll go pick up a S/G tester right now .
I'll be back

Newbylee · 09-11-2010, 12:59 PM

Quote:

Originally Posted by scottyb

OH.... you know

Dump the water out and put in fresh electrolyte and put em on a big charger for a week

Gee, they never told me that part

scottyb · 09-11-2010, 01:02 PM

Good news in those reading. They are all even and all cells are alive, just low...... S/G test results for each cell need to be recorded and posted here.

I gotta go but most here can help you read the results & figure out what's going on.

09-11-2010, 12:34 PM	#1
Newbylee Gone Wild Join Date: Jun 2009 Location: Canada Posts: 358	Battery charger question I installed some rebuilt 6V batts in my cart earlier this year.They still work fine but because we would only use it for short trips around the farm, I wasn't plugging in the charger every day.At first when I'd plug it in at nite the charger was off the next day. Now when I plug in the charger overnite it is still charging in the morning and the charger itself is very hot. Should I leave it on and let it shut of by itself still? Right now the batts read 34.7V. and it still pulls fine. any thoughts?

09-11-2010, 12:37 PM	#2
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,418	Re: Battery charger question Likely you have one bad battery...... S/G and voltage checks will confirm ~ I suspect. Typical for recons Better get it fixed before you do any controller damage running it at low amperage.

09-11-2010, 12:42 PM	#3
Newbylee Gone Wild Join Date: Jun 2009 Location: Canada Posts: 358	Re: Battery charger question thanks for the quick reply Scotty. I'll check the voltage on all the batts. whats S/G?

09-11-2010, 12:48 PM	#4
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,418	Re: Battery charger question Specific Gravity. Test done with a simple hydrometer bought from auto parts store. (not the kind with balls for antifreeze) But the temp compensating type for batteries. Any way they tell lots more than voltage as you get the true health or activity in each cell. One weak cell in one battery will cause the trouble you describe. My guess is one of your batteries is 4 volts anyway. LOL You are down 2 volts = you lost a cell.

09-11-2010, 12:50 PM	#5
golfcarfixer Gone Wild Join Date: Sep 2009 Location: Forest City N.C. Posts: 2,660	Re: Battery charger question What are rebuilt batteries? and how do they do it?

Today
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09-11-2010, 12:57 PM	#7
Newbylee Gone Wild Join Date: Jun 2009 Location: Canada Posts: 358	Re: Battery charger question Each battery measures 5.79 to 5.82 V. I'll go pick up a S/G tester right now . I'll be back

09-11-2010, 01:02 PM	#9
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,418	Re: Battery charger question Good news in those reading. They are all even and all cells are alive, just low...... S/G test results for each cell need to be recorded and posted here. I gotta go but most here can help you read the results & figure out what's going on.

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