Originally Posted by NonRubicon
Why do you have 5 tires for a vehicle that only has 4 wheels? What's the practical everyday advantage to that? You're driving down the road with $200+ dollars of unused tire/wheel on the back of your Jeep - just in case you might need it. But, we all hope all the while that we may never be inconvenienced with having to deal with a flat or blowout.
If you are one to not want to have to walk miles to get help because your battery failed, then a dual battery setup is it's own everyday advantage - just like having a spare tire.
I get your point, but a spare tire can fall into the normal tire rotation anyways, so it doesn't really have to be "unused"
As I'm understanding it, running a dual battery (without some specific reason like the ones previously mentioned) would be like running a dual set of tires in addition to your primary set.
I'm not knocking the idea....I think it's really cool, and makes sense for those who need the extra juice. I just don't know if its a practical set up for me.