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Old 03-30-2016, 02:12 AM
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Duel Batteries

Who all is running a duel battery setup? Would like to see pictures and what equipment you used. Wanting to make the switch but want to get a mental picture

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Old 03-30-2016, 02:24 AM   #2
Knows a couple things...

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What makes you want dual batteries? Few need them, not even those who do a lot of winching. They're extremely difficult to get working properly and the batteries must be identical in terms of type and age.

If you really want dual batteries I would just go for an A-B marine battery switch and forgo automatic dual battery products that are generally more trouble than they're worth.

I would instead consider just carrying a small lithium jump start battery like is sold on Amazon and eBay.

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Old 03-30-2016, 06:21 AM   #3
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I'm going to post up my experience with dual batteries and unfortunately it will be in disagreement with Jerry. So here goes; in 2004 i bought a 2004 Ford Ranger XLT 4WD. As i run high power amateur radio equipment, i installed a second battery as soon as i got the truck. The truck came with a lead/acid battery and i installed an Optima Red Top battery as the second battery fed through a high current constant duty solenoid. The way i wired it, when the engine was running the Optima was charging, when the engine was off, the batteries were isolated. I had a switch on the console that allowed me to jump start the truck from the second battery. All of the radio gear was connected to the Optima. I installed the Optima in 2004 and it lasted until 2015. Not knowing that the Optimas were junk, i bought a second when the first one died figuring 10-11 years was a good lifespan. Zero problems and worked as planned. Now that i no longer have the truck and have a Jeep, the battery is on a battery maintainer while i finish the Ford Windstar air cleaner conversion and i will put the same set-up in the Jeep with the winch and radio gear connected to the Optima. When this Optima dies, i'll purchase a different AGM battery.

Mixed type and age batteries, no problem for me.

Just remember YMMV and this is just my experience (i've been dealing with batteries for a long time as i used to have property out in the sticks and relied on solar and wind for power).

Cheers
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Old 03-30-2016, 07:43 AM   #4
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I set the batteries back to back in my garage, and give each one a pistol. They are to shuffle forward for a 10-count, then turn and fire. Winner gets installed.
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Old 03-30-2016, 09:26 AM   #5
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I set the batteries back to back in my garage, and give each one a pistol. They are to shuffle forward for a 10-count, then turn and fire. Winner gets installed.
Hilarious
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Old 03-30-2016, 09:33 AM   #6
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the main question is why?

if its for running high powered electronics while the engine is running, a larger alternator would be a better option.

if its for running power while the engine is off for camping or what not, i agree with Jerry, a small jump pack is a better option
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Old 03-30-2016, 09:57 AM   #7
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I own a Dodge diesel pickup that came factory with 2 - 27 group batteries. They are wired in parallel. The Cummins engine has an electrical air induction heater in place of glow plugs and operates for a brief time on cold mornings.

Diesels take a good amount of current to start then add the cold induction heater. Remember diesel are high compression engines, 16.3:1 and 17.2:1 for the HO

The bad part, when one fails, they both die and replacement cost X2 and batteries have gotten much more expensive, The 2 batteries have to be changed at the same time with matching batteries.

If you don't need a second battery, don't put one in, it's twice the pain in the rear, twice as hard on your charging system, additional weight, need I go on?
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Old 03-30-2016, 10:55 AM   #8
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I set the batteries back to back in my garage, and give each one a pistol. They are to shuffle forward for a 10-count, then turn and fire. Winner gets installed.
I always made mine wait till' high noon!
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Old 03-30-2016, 11:37 AM   #9
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I have always liked the idea of a second isolated battery for running accessories while the engine is off, but looking under the hood of the TJ I have no idea where I would put one. Being in wonderful CA I have to keep all of my smog equipment in tact. Running around with a group of guys in high school that all had a lot of high end stereos isolated second batteries were the norm.
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Old 03-30-2016, 09:54 PM
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There is a company that make a duel kit but run the oddessy 925 batteries. I was looking at them because I run a high output compressor.
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Old 03-30-2016, 10:03 PM   #11
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There is a company that make a duel kit but run the oddessy 925 batteries. I was looking at them because I run a high output compressor.
Jesus... Its "Dual" not "Duel"
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Old 03-30-2016, 10:04 PM   #12
Knows a couple things...

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Duel = a fight between two persons, usually involving weapons.

Dual = two of something.
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Old 03-30-2016, 10:10 PM   #13
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Duel = a fight between two persons, usually involving weapons. Dual = two of something.
Ugh. I spent my whole lunch hour looking for a picture of "Dueling batteries"... Nothing. Just like, "How do I bleed my breaks".
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Old 03-30-2016, 10:52 PM   #14
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That's because the batteries don't duel, that would be silly. They are used for dueling. As in select your battery, do the whole paces thing, turn, and throw the battery.

Renew your efforts with improved search terms and you're sure to find something.
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Old 03-31-2016, 08:46 AM   #15
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I guess i've just gotta respectfully disagree guys, sorry. My "jump pack" is automatic in that i don't have to lug it around (it's already installed) and it charges automatically. A larger alternator is nice, but this works as planned with what i have now and i may upgrade to a larger alternator if i need it (so far i haven't). As far as the weight goes, i operate an Amada 8000 watt CNC laser at work and make all of my accessories out of 6061 T-651 aluminum and have a TIG welder in my garage, so i save weight over what a lot of guys i know that use steel. Not a discussion about AL VS steel but about offsetting the weight of the second battery.

Remember, YMMV and again ... just my $ 0.02.
Cheers guys/ladies.
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Old 03-31-2016, 04:47 PM   #16
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Amada 8000 watt CNC laser at work, must be nice! lol I have a Dynasty 300 in my garage too but ya got me beat on the Amada. haha

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