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Old 06-06-2015, 10:29 AM   #1
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Damon 350 Intruder Coach Batteries

I have a 2003 Damon 350 Intruder. My coach batteries are dead and I need to purchase new ones. Does anyone know the specifications for these? I looked at the Damon site and see nothing about parts like the batteries. I would enjoy some help here.


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Old 06-06-2015, 03:15 PM   #2
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Any 12v battery will do the job. The "specs" depend on whether you need a lot of amp-hour capacity or not and the physical space available. If you nearly always have shore power available, you don't need a lot of battery capacity (amp-hours), but if you want to "boondock" you probably want more. For physical size, the simple answer is to use the same as what you have, probably a Group 24 size. Standard BCI battery case sizes are numbers like 24, 27 (larger), 31, etc.

I've written an article on how to Choose an RV Battery, but it's on a different web site. Choosing an RV battery

Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
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Old 06-07-2015, 11:02 AM   #3
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No - I think these batteries are 6 volt

Thanks for posting a reply, but I think the coach batteries are 6 volt and wired together in a way to give 12 volts. I am going to see if the people at Thor can help with the size. From all I can see, Thor bought Damon out.
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Old 06-08-2015, 06:15 AM   #4
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Take a look at 'em..

On my 2005 Intruder 377W Damon put in a pair of Interstate U-2200

These are GC-2 Flooded wet cells You can get batteries in this class from several vendors

Trojan (Considered to be one of the best but tend to be expensive)
Interstate (Johnson Controls)
US Battery (Own label)
Deka (East Penn Battery)
Sam's Club, Costco (Johnson Controls, may be labeled Interstate)
Battery's Plus (Duracell,East Penn battery)

East Pen owns it's own lead plant so it's all US content.
(I replaced my Interstates, after 9 years,with Deka)

For how to tell six from 12volt google or search the following phrase

Twelve Volt Side of Life

But use the number 12, not the word

Six volt have 3 filler ports.. 12 have six

Side note: Once they are installed (properly) in an RV, those six volt U-2200's or my new Deka GC-20s magically become a single 12 volt battery Or is I sometimes writeit Bat-ery (One battery in two parts).

Treat them like that and you will be very happy

Do not forget to check them and top off with DISTILLED water as needed.
Home is where I park it!
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Old 06-09-2015, 08:04 AM   #5
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Thanks so much

I tried calling Thor technical support (since they purchased Damon outright in 2007), but they were not helpful and could not tell me the size of these batteries or if they were 12 or 6 volt. I used the U-2200 and contacted Batteries Plus and they have them in stock. Thanks for the solid information.
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batteries, damon

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