Anyone use Marine Deep Cycle AGM Batteries?

[divemaster5734]

As the title says, I'm wondering if anyone has had success using AGM marine deep cycle batteries?
I had to leave the C350 project sit longer than anticipated, and I didn't bother to disconnect the batteries, or plug in the Norco dual charger because I had a good excuse not to, and now am enjoying the fruits of my procrastination with two dead batteries.
They'll hold voltage just long enough to turn the key, then down to 5vdc.
Gotta pay to play, and it's gonna cost a couple batteries.
I'm not gonna say what I had, they were slightly undersized, but worked for a while.
Anyhow, just wondering if the 2g system will charge AGM's or if there's any other issues to using them besides physical size constraints?
Thanks

 

[Nero]

I wouldn't suggest glass pack batteries strictly because of the vibrations and bounciness of these chassis. Just regular ol lead acid

 

[IDIBRONCO]

just wondering if the 2g system will charge AGM's

I didn't think our trucks got the 2G alternators. Just 1G and 3G

I don't really see a need for deep cycle batteries on most vehicles. They are designed to be drained way down and then be recharged. Our electrical systems are designed to let the batteries drain down little bit (ideally) during engine start up and then keep the batteries charged.

 

[DougBoy66]

I was looking at the AGM batteries but they did not have as high of a CCA rating.

 

[franklin2]

I was looking at the AGM batteries but they did not have as high of a CCA rating.

You are correct. No deep cycle battery will have a very high CCA rating compared to a starting battery. The Marine batteries are inbetween, having a little bit higher CCA than a deep cycle, but still not as good as a starting battery.

 

[IDIBRONCO]

In other words, we don't need them in our trucks. We need the high CCA ratings for winter time starting.

 

[DirtyWood]

I wouldn't suggest glass pack batteries strictly because of the vibrations and bounciness of these chassis. Just regular ol lead acid

I thought I had read that AGM batts were much better at absorbing vibrations than flooded lead-acid.

 

[2stroke]

look into this

Maxwell Ultra 31/1800 Engine Start Module​

 

[divemaster5734]

look into this

Maxwell Ultra 31/1800 Engine Start Module​

I do like the 16vdc output, will definitely get a few extra rpm's out of the starter.
Caps are great for instantaneous high out discharge, but not so great for storage, so would need the cap in addition to power storage for random stuff like listening to music when stopped, etc..
This truck will see under 500 miles a year use, will mostly sit sit there and look cool.

 

[u2slow]

Last I checked it was hard (or darn pricey anyway) to get a group 65 in an AGM or gel. Group 27 or 31 has a lot of options.

 

[divemaster5734]

Last I checked it was hard (or darn pricey anyway) to get a group 65 in an AGM or gel. Group 27 or 31 has a lot of options.

Agreed.
I just went with Duralast, they 850CCA and got them for under $150 each.
Turned out to be multiple issues.
There is a parasitic draw with the key off of .03 amps.
Also, the accessory wire off the battery had some corrosion at the relay lug which caused an intermittent open under load. The fuel pump was cycling with the engine off and key on.
Seeing as the dash is off and there's a nightmare of wires from the Centurion conversion I just disconnected all power sources until I do the interior.
Just need to back it into the shop, the axles swap, hydroboost conversion, internal wiring, pillar gauge stack changes, new carpet, door lock solenoids, and body bondo repair at the F350 to Bronco clip transition are all on the winter schedule.
Almost done with the full insulation wrap in the shop, got a LP furnace and 500 gal tank, will be 1600' of at least tolerable temps.

 

[franklin2]

.03 or 30ma draw is considered acceptable. Thereshold of being acceptable is around .07 or 70ma. All newer cars and trucks have some parasitic draw. Let any newer car or truck sit for 6 months and the battery will go flat. I would put a maintainer on it if it will sit for long periods.

 

[divemaster5734]

.03 or 30ma draw is considered acceptable. Thereshold of being acceptable is around .07 or 70ma. All newer cars and trucks have some parasitic draw. Let any newer car or truck sit for 6 months and the battery will go flat. I would put a maintainer on it if it will sit for long periods.

It's beyond parasitic for some.
My daily driver is a Laramie longhorn ecodiesel.
Among the extra bells and whistles are factory air bags, four different ride heights, and an automatic one at freeway speed that tilts the truck for the best aerodynamics based on wind tunnel tests.
It's nice when I hook up a trailer, it will self adjust to stay level.
If I set it to offroad 2 it sits about 4" higher than normal.
I can unhook a trailer and hit entry mode on the remote, and it will lower itself out of the hitch.
On the flip side I've been walking past when it just suddenly starts the compressor to adjust the level by a fraction.
Unless I'm on a very level park it is constantly readjusting the suspension.
After a couple weeks sitting there's an even chance the remote start won't work.
I am seriously spoiled by the remote start/auto climate controls.
Nay never climb into a cold or hot truck again.
Unless, of course, it's sat long enough to drain the battery below the auto features.
I'm pretty confident that one winter day day I'll have to charge the batteries to start the day.
Back to the C350, I have a Noco Gen2 5x2 charger, but have to figure out where to route and mount it and how to hide an extension cord run.

 

[mike k]

Id just run a 1095 and 850 crank batteries im running 1/0 gauge oxygen free copper wire. I want get the 6.7 power stroke starter and swap my nose cone onto it to have a better starter all around, with the setup I have I can get it to start so problem

 

[DougBoy66]

Noco Gen2 5x2 charger, but have to figure out where to route and mount it and how to hide an extension cord run.

I made a bracket to mount it behind the right side battery

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and used a cover NOCO plug in that has two plugs.

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I have one to the battery maintainer and one can be plugged into the block heater in the winter