Weeping battery and voltage questions

F

FBJR

New Member
Got a 93 CC with a 48v system and 36v in batteries.

All the batteries show good voltage even after a couple weeks of sitting after the charge. And it had not been charged for about a year prior. In fact, until I cleaned the terminals, it wouldn't take a charge!

All the batteries show 6.1 to 6.2 volts after sitting, so that looked good. But, I got a 100amp load tester at good ol HF to do some more checking and found all the batteries but 1 held just in the upper "yellow" under load.

That "1" battery falls flat under load. I mean DEAD!!!!

So I believe this and the 48v motor accounts for the slower speed.

Another battery that tests OK, seems to "weep" a little from the filler area. Otherwise it is OK under load too.

So, I figure to replace the 1 battery for sure. Even though these are Trojan 105s I was thinking of a Sams 6v cart battery for the one. If the quality is a little lower, it should match the others for some time still.

Is my thinking sound here? What about the weeping battery?

I may upgrade to 48v later, but that means a charger too. And both are not in the budget just yet.

THX
 
I would bite the bullet and buy 6 new batteries. 6.1-6.2 volts is low for a fully charged 6 volt battery. They should read around 6.5 volts even after sitting if they aren't used after charging. I would either get 8 volt batteries to give the 48 volt motor the power in needs or look for a 36 volt motor. You won't ever be happy with a 48 volt motor running on 36 volts.
As far as the cell thats "weeping" is that cell over full? Take a look at the rubber seal for signs of damage.
 
Yeah, I thought of just going to 48v but the batteries and the charger are just a little to much right now. I feel that is where I will go in the long run.

As to the weeping battery, it does that when not used or charged for several days.

As the batteries have not been charged for 2 weeks now and had not been charged at all for at least a year prior. The 6.2v is not so bad and may get a little better after a few cycles.

THX
 
How old are the batteries. You can check the age of the Trojans by looking at the letter and number on the negative posts Letter = Month Number = year. Replacing the bad battery should help quite a bit but don't expect it last as long as it should. Like Olboy said you're going to take a big hit on speed and torque with the 48 volt motor running on 36 volts even with 6 new 6 volt batteries. Replacing the bad battery will make a big difference from where your at now. As to how long will depend on the condition of the other 5 batteries...
 
The other batteries seem OK and a few more cycles could help.

I found a local CC dealer who will let me pickup a 6v off the recycle pallet. Just need to bring my load tester and get a decent one.

Later, I will replace the whole set for sure, probably going to 48v.
 
Will do, and I like this forum much better than BU so far.

I see alot of the same names
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Thanks!!
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