Quote:
Originally posted by ScottG
Unless you are using a really big tank, I don't think it would be much good without the compressor. The small tanks that fit under your hood would probably only fill up one tire. What is the advantage of dual batteries over one good battery like an Optima? It seems to me like one good battery and maybe a heavy duty alternator would be better than dual batteries. Just my opinion on the subject 
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yes, a heavy duty alternator would be cool. when you find one that will fit the X, let us know.
the reason to have dual batteries, is you put all your accessories on one battery (offroad lights, winch, air compressor) and the main operating systems on another (ignition, headlights, etc) so if you blow the battery with your winch or whatever you can still get start your truck and get home. you also isolate these things to keep them away from each other and fighting for juice.