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Old 10-12-2006, 08:57 AM   #15
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Does any body know if a Lifeline GPL-31T will fit into my box? Want to go as big as possible.
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Old 10-12-2006, 10:02 AM   #16
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Might be a silly question, but have you measured the existing battery box? That will be one of the very first things I do once my coach arrives (Real Soon Now).
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Old 10-12-2006, 10:12 AM   #17
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Well since it's 240 miles away no....
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Old 10-12-2006, 10:59 AM   #18
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I hate to repeat myself, but I think a Group 27 is the largest battery that will fit in your battery box. A group 31 definitely will not.
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Old 10-12-2006, 11:25 AM   #19
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Joe might be right but another thing to consider is the 31 is the least popular and least value. You only get 5 more AH over a 27, its quite a bit bigger, more expensive, heavier, etc all for 5 AH.
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Old 10-12-2006, 11:51 AM   #20
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Remember to include the extra room for the cables in your space calculations. It's nice to have a little extra wiggle room and not pinch them into too tight a spot. The cables that Airstream used on our 70's units were not very flexible. I've replaced mine with welding cable which has finer strands in order to bend easier. Of course, you also have to consider the type of connections for these batteries. If you keep the standard car battery connectors you might need extra room to convert from the marine type to posts.
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Old 10-12-2006, 01:26 PM   #21
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Cabelas battery

Cabela's AGM battery is imported by Universal Power Group, a subsidiary of Zunicom. They originally were Universal Battery Corp.

The published AH rating is 90 AH for the group 27 battery. The group 30 claims 110 AH.
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Old 10-12-2006, 02:15 PM   #22
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Thanks guys.
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Old 10-12-2006, 02:57 PM   #23
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Yes they will . I just installed 2 of these in our 87 Excella . The bottom lip of the battery box that the door hinge is riveted to needs to be cut back about 1/4 of an inch for clearence . I did this with a die grinder and carbide burr .
We will be be drycampping this weekend for a installation rally with 30 degree temps so this will be the test.

Good luck, Jeff
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Old 10-12-2006, 05:17 PM   #24
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I noticed that the Cabelas batteries have a cranking amperage rating. This means they can be used for engine starting, and are not true deep cycle batteries. Their plates are probably not as thick as true deep cycles and will discharge differently. I think I'd look for true deep cycle AGMs. I think that Lifeline AGMs are true deep cycles.

The attached may help:

http://www.windsun.com/Batteries/Battery_FAQ.htm
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Old 10-12-2006, 06:18 PM   #25
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My understanding, which is very incomplete, is that you can't compare plate thickness with an AGM battery to Lead Acid. The various schemes to replace old fashion lead acid batteries certainly have merit. However, I question the cost/benifit ratio of the AGM for trailer use. They seem to be selling them mainly to the marine market and I remember the original Gates jelly roll batteries were marketed to the offroad crowd. This technology is extremely good in reisiting high shock environments like this but unless you beat the puddin' out of your trailer I don't think it's really all that necessary. For the cost you can just about buy two conventional deep cycle batteries.

This thread was the first I'd heard about gel cells requireing different charging. The best batteries I've ever had in my cars were AC Delco gell cells with the "Green Eye". Both were used in old Fords so no special charging there. One was in an old Bronco that sat WAY more than it ran. In effect it was a deep cycle battery since it was usually down to the point of needing a "quick charge" from sitting so long whenever it was used. It's self discharge rate seemed to be better than lead acid and it lasted longer in this duty than any lead acid battery.

-Bernie
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Old 10-12-2006, 06:44 PM   #26
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Bob brings up a good point in that "usually" when the CCA is advertised, it is a hybrid type of Marine battery. This may not be the case and I'm not at all familiar with Cabela's batteries.
It is also true that all deep cycle batteries have CCA but it is usually not labeled as such.
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Old 10-13-2006, 08:22 AM   #27
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I think I've made up my mind to go with a LifeLine AGM so we can stop talking about the Cabelas batteries. BTW AGM batteries are not gel cells.
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