Concord Lifeline AGM's - been usin' 'em for several years now (I have 3 80 amp/hour house batteries in my RV) and they work great! Talk to Randy at BestConvertor.com - a great guy on top of it!
http://www.bestconverter.com/
No offense to those on the board that are "high" on the Optima products, but these will BURY 'em!
And for your chassis batteries (including the VX) it's impossible to beat the new Sears Platinum DieHard line of AGM's. I've got one of those in my RV, and WILL be putting one in my VX!





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