Battery, When to buy?

[Rich]

I have two Concorde batteries and live in the deep south- where battery life isn't too good. I replaced both of my batteries after 7 years. Cranking was slightly better- but better do it before one cell goes belly up! My method, admittedly, was arbitrary but it worked.... this time.

[Jsavage3]

Have had a Concorde RG-35AXC in my '86 J for six years of dependable service. Recently I noticed that, during hot starts, my cranking speed after 6-9 blades was starting to slow down a lot.

I just ordered a new -35AXC from Aircraft Spruce for $272.95 with free shipping.