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05-04-2021, 09:09 PM | #11 |
Gone Wild
Join Date: Oct 2019
Posts: 226
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Re: Battery Health Question
Drive your golf cart over some horribly rough terrain and shake the crap out of those batteries.
You might get lucky and dislodge some of the sulfate buildup coating the plates. Unlike Lithium, lead acid batteries need to be exercised once a month to keep them in good shape. They need to be drained down and then charged back up at a rate fast enough to cause the sulfate buildup to be blown off the plates. This is easy if the buildup is "soft" sulfates, but won't work for "hard" sulfation. Sometimes, if you subject the battery to physical abuse like heavy vibration or getting jarred around, some of the hard sulfates can fall off. Its not likely to bring your batteries back, but it might recover some of the lost capacity. |
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05-06-2021, 01:21 PM | #12 |
Getting Wild
Join Date: Apr 2020
Location: SE
Posts: 77
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Re: Battery Health Question
Speaking to motor brushes, I also had a similar issue. My cart started jerking real bad and eventually wouldn’t run at all. The brushes had swelled in their holders and were no longer able to move freely.
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05-06-2021, 02:07 PM | #13 |
Gone Wild
Join Date: Jul 2018
Location: Ramer, AL
Posts: 1,450
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Re: Battery Health Question
I think the cutoff set at 46v is your problem....I go below that often when driving my cart in the woods.
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05-07-2021, 03:47 PM | #14 |
Bonafide Nincompoop
Join Date: Dec 2015
Location: Charlottesburg Va
Posts: 8,987
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Re: Battery Health Question
Did you set the charge profile in the charger for your batteries? That makes a difference.
Resting at 8.3v is really low for Crown batteries. It’s not uncommon for batteries to drop to around 42v when under load, but that should only be happening if you’re at full throttle trying to go up a hill or something. It sounds to me like they’re not being charged with the correct profile. Have you checked the water levels in the cells? |
05-17-2021, 12:07 PM | #15 | |
Getting Wild
Join Date: Mar 2016
Posts: 136
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Re: Battery Health Question
Quote:
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05-17-2021, 12:10 PM | #16 | |
Getting Wild
Join Date: Mar 2016
Posts: 136
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Re: Battery Health Question
Quote:
I keep an eye on water levels, just topped it off last time down but still had 1/4" above plates. |
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05-17-2021, 12:11 PM | #17 | |
Getting Wild
Join Date: Mar 2016
Posts: 136
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Re: Battery Health Question
Quote:
I was using the cart off road in the woods doing some tree planting. I remember going over several logs and getting jarred pretty good. Any chances this did damage inside the batteries themselves? Problem started shortly after I came out of woods and got onto main road. I did not make it 1/4 mile after that. |
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05-17-2021, 12:33 PM | #18 |
Bonafide Nincompoop
Join Date: Dec 2015
Location: Charlottesburg Va
Posts: 8,987
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Re: Battery Health Question
Have you checked the voltage of each battery individually while they are under load?
If any one battery is dropping significantly lower than the rest that will cause a bottleneck and may cause the cart to shut down. Do any of the batteries have visible damage to the bottom or sides of the cases? You can usually see enough from under the cart to tell if one has been impacted by something. A loose connection or damaged cable could also cause problems. Regardless of any of that, the overall voltage after a charge still is too low. Which Lester charger so you have? |
05-18-2021, 08:35 AM | #19 |
Getting Wild
Join Date: Mar 2016
Posts: 136
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Re: Battery Health Question
I have the following charger.
Club Car/Yamaha 36/48 Volt Golf Cart Charger - Lester Summit II I have not checked under load yet, just at rest, all were 8.3V. I checked all cables, they were tight. I did not look under batteries, good idea as since I was off roading it I could have got something up into the batteries. |
05-18-2021, 10:41 AM | #20 |
Gone Wild
Join Date: Jul 2018
Location: Ramer, AL
Posts: 1,450
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Re: Battery Health Question
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