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I have a 99 E-350 XLT Super Duty. It has an extra battery hung under
neath by the side cargo door. Does any know any thing about the specs of this
setup. What does it power? It is charged in parallel with the main starting
battery? Is it on an isolator, etc.??? Should/Can I hook an Inverter up to it and how best to do that? (There is a power distribution panel under the hood, but I don't know if the 2nd battery drive this, or the starting battery.)