Which is the Better Battery Bank?

Does R/S even market a marine 12v battery?

Mex has said before that any of the standard car jar battery sizes simply cannot have true deep cycle internals stuffed into them and be effective, but not sure if that was a CCA / engine starting perspective.

I saw R/S did offer a T-1275 sized scrubber battery, but the prices I saw quoted were double that of the Trojan.

I think I am an AGM convert for good, at least in my current application for lead acid batteries. My hydrometer is dusty, the screwy 31 still going in light cycling duty.

Probably two of these ... instead ;) :

http://www.rollsbattery.com/wp-content/uploads/batteries/S6-460AGM.pdf

Weight / amp hours = plate thickness x dimension gives electrolyte volume to active plate area. More liquid more weight and similar amp hours for a comparison. It all means ending up with an easier to manage longer lived battery. Package restrictions mean compromises. A group 27 with my .330" plates would mean around 8 amp hours at six volts.

The Surrette ad claims their batts are double-hulled and have more dense plastic too, so I suppose a very small extra portion of their weights would go to that. Not that it would change their first place position in the race though.

"A dual container construction and high-density polyethylene material maximizes durability and eliminates acid leaks even if ..."

pnichols wrote:
Probably two of these ... instead ;) :

http://www.rollsbattery.com/wp-content/uploads/batteries/S6-460AGM.pdf

Cycles vs discharge looks way better than Lifeline.

Lifeline manual see pg 38

All hail the flooded Rolls/Surrette L-16, Absolute King of the Lead acid deep Cycle battery world.

With the exception of 6 2v L-16 in series cells of course.

And PT's 18 year old wally world 12v group 27 jars that are still serving the new owner well :)

time2roll wrote:

pnichols wrote:
Probably two of these ... instead ;) :

http://www.rollsbattery.com/wp-content/uploads/batteries/S6-460AGM.pdf

Cycles vs discharge looks way better than Lifeline.

Lifeline manual see pg 38

Can't compare numbers across manufacturers, they do not use the same testing protocol, as there is no standard.

Hi landy,

I fear the wally worlds have passed now. The RV itself is at the wreckers yard. But they did reach the ripe old age of 12. BTW they were group 29, not 27.

Only one wally world left--being used as a starter battery. It is 8 and what saves it is constant recharging via a trik-l-start with solar feeding it. I may well replace it this winter. In 2017 it will be 9 years old.

landyacht318 wrote:
All hail the flooded Rolls/Surrette L-16, Absolute King of the Lead acid deep Cycle battery world.

With the exception of 6 2v L-16 in series cells of course.

And PT's 18 year old wally world 12v group 27 jars that are still serving the new owner well :)

I had a Wally world 27 last 7 years, with the first 2 years being cycled very shallowly and the subsequent 5 years only engine starting and being topped up by solar. When i replaced it, it could crank my engine for only 3 seconds before stalling, but luckily it only required 2 seconds befire it would fire.

However 2 other Wally world 27s purchased at same time failed at 13 and 23 months of light cycling, but the fool owner did not have Solar's absorption voltage set high enough, nor its duration dialed in properly either. User error/ignorance on my part, back in 2008.

Dart Board Commentary?

R&S L16 plates are almost twice the thickness of a group 31 Concorde battery. It's best to maintain a minimum degree of relavence when doing comparisons. My 2 volt cells have positive plates again twice the thickness of the L16. And each cell holds 3 gallons of electrolyte.

Once again - it's all about compromise. Gain in one area fall back in another. Weight/Lifespan/Cost/Performance

The trick is to find out which battery is best for you. Then how to manage it to best effect.