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Unread 02-18-2018, 06:47 PM   #11
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Default Re: How do I test my batteries?

Your doing great Tech Support
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Unread 02-24-2018, 08:56 AM   #12
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Location: Sycamore, IL
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Default Re: How do I test my batteries?

Again, I can not say how helpful everyone on this site has been. Being a newbie, it has really helped me get a good start on my now rebuild.
So....I fully charged my batteries and tested I get 36.2 volts. Each individual battery tests at 6 volts. I am guessing my batteries are toast. My question is, I have seen battery additives advertised to bring back your batteries to almost full strength. Does this product work? I am just trying to get this summer out if the batteries and gradually upgrading the cart to 48-Volt. My plan is to do things in this order:

Upgrade to 2ga wiring
Alltrax controller
36/48 solenoid (basic)
New multi volt charger 1050W
New 8 volt batteries

Second stage
Upgrade the F/R switch
Upgrade the solenoid
New motor

If anyone has any other suggestions, please let me know.
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Unread 02-24-2018, 09:24 PM   #13
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Default Re: How do I test my batteries?

I’m just a repeater of stuff I’ve read here, but the general consensus seems to be that those products are snake oil. Interestingly, this came up fairly recently and johnnie b surprisingly lead some small amount of credence to it. However, I believe he said that was only in very specific circumstances that weren’t very common. I’ve also read about multiple back to back charges sometimes bringing a bit of life back to them.

FWIW, my advice on your upgrades is to post exactly what you want out of your cart and how you plan to use it. Riders, terrain, desired speed, etc.

If you do get new cables first, make sure you order them for 8v batteries. The ones for 6v are shorter and will be worthless when you pull the trigger on the new pack.
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Unread 03-01-2018, 09:10 PM   #14
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Location: San Jose, CA
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Default Re: How do I test my batteries?

Monitoring voltage drop on each individual battery at full throttle uphill worked great for an easy DIY load test. Took just a few seconds per battery, alligator clips & multimeter.

3 batteries dropped from 12.5V to steady 10.5V, loaded. 1 evil battery dropped from 12.5V to 7V. BINGO! Trojan 4 pack, only 2 years old.

Why didn't I think of that! Thank you!
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