Quote:
Originally Posted by Still Kickin
Make it easy on yourself, buy one of these cigarette lighter battery tester | eBay. Then look up the 12v battery chart so you can determine % left. It's important to calibrate the reading on your tester, so you can make any adjustments to the chart data.
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This is the easiest for most Small RV's, The panel mounted meter is very nice option if you want to have one mounted and constant view, using a voltmeter you either have to get to the battery or use a test points in a cigarette power port.
Just remember not let your battery get below 50% power or 12.2 volts for max life of you battery.