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Open Roads Forum  >  Tech Issues

 > One 6V battery discharging really fast

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RichieW13

California

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Posted: 12/10/20 02:19pm Link  |  Quote  |  Print  |  Notify Moderator

Almost 3 years ago I swapped out my 12V battery for two 6V (Trojan T-105) batteries.

Last weekend, I noticed that my trailer was losing power really fast after charging up. I used a volt meter and discovered that one battery was reading ~4 volts and the other was reading ~6 volts.

The water level looks to be fine on both.

Is it possible that one battery is just bad? Is there some other issue I should look for? Should I just replace the bad battery, or do I need to replace both to keep them approximately the same age?

madjack60

littleton

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Posted: 12/10/20 02:29pm Link  |  Quote  |  Print  |  Notify Moderator

Almost sounds like a cell in the battery is dying

wopachop

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Posted: 12/10/20 02:37pm Link  |  Quote  |  Print  |  Notify Moderator

Know anyone who could bring over a charger capable of doing an 8v equalization charge?

Or if you have a 12v Battery Tender you can possibly use that on the single 6v.

time2roll

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Posted: 12/10/20 02:39pm Link  |  Quote  |  Print  |  Notify Moderator

I believe you have happened upon the very rare situation where your GC2 has a shorted cell.
Check your warranty but I think you need a replacement.


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RichieW13

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Posted: 12/10/20 02:40pm Link  |  Quote  |  Print  |  Notify Moderator

wopachop wrote:

Know anyone who could bring over a charger capable of doing an 8v equalization charge?

Or if you have a 12v Battery Tender you can possibly use that on the single 6v.


Are you saying that the method of charging the battery can impact the length that the charge will last?

wopachop

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Posted: 12/10/20 02:55pm Link  |  Quote  |  Print  |  Notify Moderator

As mentioned above you might have lost a cell.

You can try what's called an "equalization charge" and see if the bad battery can still be used.

Wonder if the possible bad cell actually looks different if you shine a flashlight at night down the water holes.

RJsfishin

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Posted: 12/10/20 03:24pm Link  |  Quote  |  Print  |  Notify Moderator

OP
don't let them confuse you. You need a new battery. There aint no kind of equilizing (hi voltage) charging going to fix that battery w/ a stone dead cell.
Its just too bad you went w/ the hi $ Trojans, as you should replace w/ same.


Rich

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Lwiddis

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Posted: 12/10/20 03:39pm Link  |  Quote  |  Print  |  Notify Moderator

Certainly! Correct voltage for bulk, absorption, float and equalization are important. Trojan has the numbers on their site. .


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2oldman

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Posted: 12/10/20 03:46pm Link  |  Quote  |  Print  |  Notify Moderator

It's possible a bad connection can limit charging current to the one battery. 3 years is a year sooner than I went through Trojans, but maybe your usage is heavy. Replace both.

* This post was edited 12/10/20 03:54pm by 2oldman *

Lwiddis

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Posted: 12/10/20 05:51pm Link  |  Quote  |  Print  |  Notify Moderator

X2, 2oldman. Replace both batteries.

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