On line source for Lifeline batteries?

I really endorse your decision to seek the reputation of a seller of AGM batteries. Too many complaints of batteries of old stock showing 12.50 volts or less. It's a vendor's responsibility to ensure they are vending a maintained product. IMHO you are purchasing the best and the 'best' will easily last 600 full range cycles which translates to what...10-years of vacation boondocking, minimum? Lifeline has their act together with their online user manual. I am rigid with my own 31 about maintenance and it has paid off handsomely.