[BRENT in 10-uh-C]

There is one thing that has been missing in the advice above, and to me this is the same as changing engine oil. You get longevity out of an engine that has the oil filtered & changed on a routine basis, ...and a battery's longevity can be much the same. Google "Battery Maintainer Desulfator" and read up on this topic. MAFCA's Tech Director Jim Cannon has 6 volt batteries that have/are approaching nearly a decade old. His secret to battery longevity is the desulfation process.