What is better or supply power longer? Two(2) six(6) volt batteries wired in series or two(2) twelve(12) volt batteries wired in series? I am debating which way to go for the longest lasting power as...
Given similar design there is no difference between a single 12V and two 6V. Internal construction between 6 and 12V on Lifeline batteries is the same I can not speak for the major battery manufacturers. Important to remember is that all batteries need to be the same age and condition or the system will be dragged down to the weakest link.