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Old 01-31-2019, 05:31 PM   #1
Atteboy
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Default Batteries will not fully charge

I’m having trouble getting my 2 of my 6 batteries to fully charge. I currently have 6, 6v Trojan T-105 batteries in my Ezgo TXT. The batteries are less than 6 months old. I am able to get 4 of the batteries up to 6.7v with the cart charger but two of them will top out around 6v. I was able to manually charge these two to 6.1v with a 12v car charger but no higher. The batteries are numbers 3 and 4 in sequence within my cart. All the water levels are good. I just began testing the voltage of the batteries and am not sure if this has been an issue since the batteries were originally installed. Any thoughts? Thanks in advance.
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Old 01-31-2019, 08:59 PM   #2
Cobra,1
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Default Re: Batteries will not fully charge

What do the batteries measure when using a hydrometer?
What is the pack voltage
Do you know batteries are all the same age?
Are these 2 batteries being used to power 12 volt accessories in place of using power convertor?
Info needed to help troubleshoot
Thanks
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Old 01-31-2019, 10:12 PM   #3
Atteboy
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Default Re: Batteries will not fully charge

-The pack reads 37.2v
-All batteries were manufactured in November 2018
-Currently I have a kicker Bluetooth stereo, a dual USB port and my horn wired to the two lower volatage batteries, positive on one, negative on the other.
-I don’t have a hydrometer but can get one tomorrow.
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Old 01-31-2019, 11:35 PM   #4
orangeman6
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Default Re: Batteries will not fully charge

Quote:
Originally Posted by Atteboy View Post
-The pack reads 37.2v
-All batteries were manufactured in November 2018
-Currently I have a kicker Bluetooth stereo, a dual USB port and my horn wired to the two lower volatage batteries, positive on one, negative on the other.
-I don’t have a hydrometer but can get one tomorrow.

Get a voltage reducer or a separate 12v battery for your accessories. Those two batteries are getting pulled down farther than the others and the charger can only sense total pack voltage. It’s bad for the whole pack.

Johnnieb talks about having success bringing batteries back up by numerous back to back charges. It’s worth a shot.
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Old 02-01-2019, 12:25 AM   #5
Mooncarter
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Default Re: Batteries will not fully charge

If you can't get them above 6.1 something is not right. Even if you abused them for a couple months.

Like orangeman says what you are doing is killing them. Unhook what you have right now and get this straightened out and get a converter.
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Old 02-01-2019, 01:48 AM   #6
BobBoyce
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Default Re: Batteries will not fully charge

You really need to bring those two batteries up to match the others before doing whole pack charges back to back. The worst part of all is those batteries were unbalanced during the break-in period. Very bad for their overall lifespan.
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Old 02-01-2019, 02:02 AM   #7
Mooncarter
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Default Re: Batteries will not fully charge

Quote:
Originally Posted by BobBoyce View Post
You really need to bring those two batteries up to match the others before doing whole pack charges back to back. The worst part of all is those batteries were unbalanced during the break-in period. Very bad for their overall lifespan.
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Old 02-01-2019, 02:05 AM   #8
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Default Re: Batteries will not fully charge

That's why I said RIGHT NOW. Awful to ruin those new batteries.
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Old 02-01-2019, 07:41 AM   #9
Atteboy
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Default Re: Batteries will not fully charge

I will unhook the accessories now until figuring this out. This is how my shop wired them so I’m disappointed in that. Any ideas how to get those two up to charge? Should I use my 12v/6v drip charger on them individually until they increase? Do I need to disconnect them from the others before doing so?
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Old 02-01-2019, 08:41 AM   #10
yurtle
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Default Re: Batteries will not fully charge

Quote:
Originally Posted by Atteboy View Post
-The pack reads 37.2v
-All batteries were manufactured in November 2018
-Currently I have a kicker Bluetooth stereo, a dual USB port and my horn wired to the two lower volatage batteries, positive on one, negative on the other.
-I don’t have a hydrometer but can get one tomorrow.
Make sure you get a good hydrometer, not one with pretty colored balls.
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