I think the batteries in my pickup are going on 8 years old?
And they've been from +110F to -40F in the last year.
The old pickup starts right up.
That said some of the newer vehicles seem to need more juice at start up for the all the electronic chit. I've replaced the battery in my wife's car twice in the last 5-6 years. It won't even spin over when the battery 'dies'. Get some horsechit message on the screen....
Needless to say I've kept the 'bad' batteries and use them in old chit that can work on 12 volts or whatever they show on the tester.
