how to make this work without me dying (extra battery predicament)

[IgnoreMe 5,000+ posts]

system in sig with an everstart maxx battery under the hood (875ca) and a 200a mean green alt.

starting to work on my electrical a little bit more now, and am trying to get the voltage drops under control (not THAT bad even. these kickers are pretty efficient //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif ). but none the less, the better the voltage, the happier ill be. so i figured time to add another battery. heres my issue:

all my research has told me to not mix a deep cycle style battery and a regular battery. research has also told me not to put the extra battery in my hatch area due to the gas released.

so im kind of in a jam...how do i add more batteries that i can put in the back without going to a sealed battery or mixing battery types? i dont want to really buy a deep cycle battery but these seem to be the only ones that are fully sealed.

so what the **** do i do? i thought about putting in a everstart maxx marine battery since its supposedly not a real deep cycle but its somewhat sealed...is this a bad idea considering i have a regular starting battery under the hood? anyone with an explorer with more than 1 batt chime in...

what im hoping to accomplish is, keeping my voltage up, without blowing my car up...

edit: more research shows that most marine batteries are considered "hybrid" and shouldnt be discharged more than 50%. so im assuming they are not a deep cycle battery (mostly)

anyone know if the marine maxx batteries are sealed?

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[djman37 5,000+ posts]

i've heard not to mix types. To be safe from malfunction on an optima, if you go that route, run some aquarium(sp) hose from the vent to the outside of the vehicle.

I went with Kinetik and haven't looked back. 1800 under the hood and up to 4 2400's in the back. yee-haw.

 

[IgnoreMe 5,000+ posts]

i've heard not to mix types. To be safe from malfunction on an optima, if you go that route, run some aquarium(sp) hose from the vent to the outside of the vehicle.I went with Kinetik and haven't looked back. 1800 under the hood and up to 4 2400's in the back. yee-haw.

yea ive looked into kinetiks but jesus they are expensive //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

i thought kinetiks are deep cycle though no? i just really dont have the cash to swap out two batteries, nor do i have the cash to buy a $300 battery

edit: hmm the kinetik website says they are an AGM style battery (same as what benz is using now), which means they are not just a regular lead acid right. what exactly is the problem is using two different style batteries? do they just drain each other?

 

[djman37 5,000+ posts]

yea ive looked into kinetiks but jesus they are expensive //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif
i thought kinetiks are deep cycle though no? i just really dont have the cash to swap out two batteries, nor do i have the cash to buy a $300 battery

edit: hmm the kinetik website says they are an AGM style battery (same as what benz is using now), which means they are not just a regular lead acid right. what exactly is the problem is using two different style batteries? do they just drain each other?

that's what I got from my conversation with kinetik tech. The damage was over time, and it went on for a bit. I was convinced to stick with a single type of battery though. I'm gonna put a yellow-top in my wife's eclipse soon.

 

[theCybe 5,000+ posts]

To my knowledge, that's what the battery isolator is for.

As the batteries sit around, connected, current flows from the 'more charged' battery to the 'less charged' -- a little bit more than needed flows, and as the tides turn it flows back. Back and forth and back and forth,

Ultimately wasting energy, and in some cases, killing the batts.

The isolator is just like a relay on a remote lead; When the car's on (and therefore alternator,) the batteries become connected. When the car's off, the batteries are isolated.

 

[IgnoreMe 5,000+ posts]

To my knowledge, that's what the battery isolator is for.
As the batteries sit around, connected, current flows from the 'more charged' battery to the 'less charged' -- a little bit more than needed flows, and as the tides turn it flows back. Back and forth and back and forth,

Ultimately wasting energy, and in some cases, killing the batts.

The isolator is just like a relay on a remote lead; When the car's on (and therefore alternator,) the batteries become connected. When the car's off, the batteries are isolated.

wait...so its OK to run a sealed deep cycle and a regular battery as long as the two are only connected when the alt is running?

i know regular batteries and deep cycles charge differently so wouldnt this cause some sort of problem?

 

[IgnoreMe 5,000+ posts]

that's what I got from my conversation with kinetik tech. The damage was over time, and it went on for a bit. I was convinced to stick with a single type of battery though. I'm gonna put a yellow-top in my wife's eclipse soon.

hmm that kinda sucks. that means in order to accomplish what i want i would have to drop my reg battery and buy two expensive *** ones //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[theCybe 5,000+ posts]

wait...so its OK to run a sealed deep cycle and a regular battery as long as the two are only connected when the alt is running?
i know regular batteries and deep cycles charge differently so wouldnt this cause some sort of problem?

That's not at all what I meant if that's what you got from it.

I don't know the specifics of what's different between those types of cells, or how compatible or incompatible they might be.

 

[scplayboy00 10+ year member]

I have the biggest everstart under the hood and the biggest everstart marine in the back. I also have a 250amp mean green. I have a drop to 13.6 in the front and 12.8 in the back. So dont do it.

 

[IgnoreMe 5,000+ posts]

That's not at all what I meant if that's what you got from it.
I don't know the specifics of what's different between those types of cells, or how compatible or incompatible they might be.

then what did you mean?

scplayboy: from what i understand the deep cycles are slower to recharge, which could be the reason its sitting lower than the front battery...but none the less i can see now how the front battery would try to charge the rear battery to bring both to equal power levels.