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Question on running dual batteries (different than usual...)

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Old Mar 25, 2006 | 12:41 PM
  #1  
Keggo's Avatar
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From: Bakersfield, CA
Question on running dual batteries (different than usual...)

After doing my H.I.D. retrofit my 12V battery is too big and pushes on my passenger side headlight. Anyway, my question is this... I'm thinking of running dual inline 6V batteries. My main reason is because there really isn't enough room to relocate my current battery anywhere else. So, I figure, if I have an Optima 6v in the stock battery tray and one mounted closer to the cab, in theory it should work fine,right? As long as I wire it: chassis ground to battery 1's negative -> battery 1's positive to battery 2's negative -> and then have battery 2's positive to starter and fuse box (stock routing). Does this make sense?

Or should I route wires for each battery seperately to the fuse box and starter?
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Old Mar 25, 2006 | 06:44 PM
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you would have to hook them in series, thats -

ground to negative 1 (battery 1), positive 1 to negative 2. positive 2 to starter fuses, etc. this will increase your voltage (giving you 12 volts) but keep the same amperage of one battery.

if you hooked them in parallel, that would be negative1 to negative2 to ground, and then positive 1 to positive 2 to ground, that would only give you 6 volts, but twice the amps.
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Old Mar 25, 2006 | 06:56 PM
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couldn't you just get a slightly smaller battery?
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Old Mar 25, 2006 | 07:00 PM
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Maybe a battery relocation kit? Put it in the back or something...

Lamm
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Old Mar 25, 2006 | 07:17 PM
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yeah that would be awsome to do a dual baterys in toolbox in the back like waskillywabbit did. he has pics on his website showing you how it looks
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Old Mar 25, 2006 | 09:44 PM
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From: Bakersfield, CA
Originally Posted by L33T35T 4Runner
you would have to hook them in series, thats -

ground to negative 1 (battery 1), positive 1 to negative 2. positive 2 to starter fuses, etc. this will increase your voltage (giving you 12 volts) but keep the same amperage of one battery.

if you hooked them in parallel, that would be negative1 to negative2 to ground, and then positive 1 to positive 2 to ground, that would only give you 6 volts, but twice the amps.

Yeah, that's exactly what I had planned. I just want to make sure they'll be charged evenly. What gauge wire should I use? Like 2ga. stranded, right?
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Old Mar 26, 2006 | 07:23 AM
  #7  
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the thicker the better
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Old Mar 26, 2006 | 10:19 AM
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From: Bakersfield, CA
Cool!
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Old Mar 29, 2006 | 03:54 AM
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Don't forget to check the amperage rating on your 6V batteries. They may not be sufficient to handle the job.
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Old Mar 29, 2006 | 03:16 PM
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Cool... thanks!
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Old Apr 9, 2006 | 09:00 PM
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That should be pretty cool. Lots of extra weight though. I think you could move the battery tray a little for a lot les hassle and $$$. Move one 12v battery to the back of the rig??

If there is no room to relocate where are you going to put the second 6v??

And where did find a 6v optima, I was just on their site and couldnt find one.

Last edited by 4x4nala; Apr 9, 2006 at 09:08 PM.
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Old Apr 9, 2006 | 09:33 PM
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From: Bakersfield, CA
They only have the red top 6v's. Also, I heard with having at battery too far away from the starter kind of causes some cold start up problems...
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Old Apr 9, 2006 | 09:58 PM
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Originally Posted by Keggo
They only have the red top 6v's. Also, I heard with having at battery too far away from the starter kind of causes some cold start up problems...

As long as you upgrade the wiring to the starter you shouldnt have a problem.

Its still a big battery, just half as wide. I still think it would be easiest to move the battery aft about one inch.

What is so much bigger with this coversion? Isnt the washer fluid resivour in between the battey and the headlight?
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Old Apr 9, 2006 | 11:22 PM
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From: so.cal
the batteries should match (of the same capacity) for charging purposes
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Old Apr 10, 2006 | 03:04 PM
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85TurboRunner's Avatar
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From: Vancouver, WA
just get a braille battery http://www.brailleauto.com/
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