The deep cycle batt for my trolling motor is a Delco, purchased 21 years ago. I only use it 2-3 times a year, but it always charges up and does what I need it to do.

Come to think of it, the Delco in my truck is original also, and it's 11 years old.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.