Group 27 battery

US Battery makes a 12 volt deep cycle battery. I replaced a pair of group 27's in my class C, they are bigger and a tad taller but they fit in the entry steps of my Forester.

http://usbattery.com/products/12-volt-batteries/us-31dc-xc/

Trojan makes a line of 12 volt Deep Cycle Batteries. They are used in 48 volt Golf Carts.

In the world of flooded batteries the only true true deep cycles I know of are 6 volt batteries. The 12 volt ones are hybrids which are design to pass a lot of current for starting and do better than a starting battery for utility use. Deep cycle 6 volt batteries are not expensive and will last longer for coach battery use.

I wouldn't install a Marine/RV battery in our RV to power the coach. IMHO, a deep cycle only (not Marine or Starting) battery should be used.

I don't know that Die Hard offers a true deep cycle only battery - in either AGM or wet cell design? Interstate used to offer a true deep cycle only 12 volt battery - but it was AGM. That's why I had two of these Interstate batteries in our RV for over 8 years. I believe that Interstate still does offer some large 12 volt true deep cycle AGM batteries. At the bottom of this chart are a couple of large 12 volt true deep cycle AGM batteries very similar to what I had in our RV:

http://www.interstatebatteries.com/content/product_info/wheelchair_spec.asp

It's very difficult to find true deep cycle 12 volt batteries that are wet cell - most all are AGM - which means expensive. That's why most folks use 6 volt golf cart batteries in their RVs. These are wet cell batteries, are true deep cycle, our easy to find, and are not expensive.

What do you think of Die Hard Marine/RV deep cycle batteries vs Interstate batteries?

"Full River = China....naa, I'll pass"

But probably/hopefully the Fullriver battery line is one of the (rare?) legitimately high quality manufactured-in-China products that actually meets solid engineering criteria ... plus:

- Is becomiing widely used ... and more and more respected, from what I can tell.

- Was chosen by a company with impeccable worldwide battery credentials - Rolls Surrette - to relabel the very Fullriver model in my link as a Rolls Surrette model until Rolls Surrette can get their own AGM battery manufacturing line up and running ... what an endorsement!

- Is as expensive as many other top notch AGM battery products (only a little less $$$ than Lifelines) ... which is proof enough that it isn't a common junk product being manufactured in China.

FWIW, I was going to buy a couple of Lifeline AGM batteries before I decided on Fullriver. I decided against Lifeline because Lifeline refuses to specify that it's OK to float their AGM batteries at 13.6 volts ... which is what I float our RV batteries at week after week, month after month, while the RV is in storage. The Fullriver battery I chose (which is also available relabeled for Rolls Surrette) has an in-writing float specification of 13.6 to 13.8 volts ... as did the previous two Group 29 AGM batteries in the RV that these Fullriver batteries replaced. I trust some manufactured-in-China products ... but far from "all".

Full River = China....naa, I'll pass

John,

Here's what I just installed in my GMC 4X4 PU with it's 350/5.7L engine. I got it at O`Reilly Auto Parts. Note is has both kinds of terminals - side terminals and top posts. 3 year warranty. AGM, so zero maintenance and almost no loss of charge sitting around between uses ... which my PU does - sit around a lot - but when I want it to start and run I want it to do just that with no battery issues year after year:

http://www.oreillyauto.com/site/c/detail/SSBQ/3478PLT/03321.oap?year=2006&make=Chevrolet&model=Silverado%2B1500&vi=1432426&ck=Brand+Search_C0423_SSB_1432426_-1&mn=Super+Start&mc=SSB&pt=C0423&ppt=C0005

I'm battery shopping as we speak. What I need is a Marine Starting Battery for the MerCruiser (Chevy 350/5.7K) in our boat. The Fullriver battery Phil linked has different terminals than what I'm seeing offered elsewhere. The ones I'm seeing have basically two sets of terminals. One is lead posts like a car battery and the other is a pair of threaded studs. Note that in the Lead/Acid type, these "two sets of terminals" 1. Deep Cycle (like Trolling Motor or RV House), 2. Starting (car battery with marine terminals), and 3. Dual Purpose (a Starting Battery you can discharge deeper than most Starting Batteries...or is it a Deep Cycle Battery you can Start with...). All I need for the boat is a Starting Battery. Could use Automotive with adapter terminals, but I just got 7 years out of a 1-year warranted marine start battery from Sam's Club, so I'll go that way again.

Joe,

Here's what I just put two of in the battery area under our step. The dimensions of these batteries are about the same as several other Group 31 batteries I've checked out ... so you just might be able to fit a couple of standard Group 31 batteries into your rig, instead of Group 27:

http://www.dcbattery.com/fullriver_dc115-12.html