Don,
This suggestion is almost a joke - but, I have done this:
Get a 6v/8v/12v automatic trickle charger, if your new battery is going to sit in your undriven truck for more than a month:
https://www.ebay.com/i/123098256851?chn=ps(Note: it even works for farmers who have 8v tractor batteries).
Yes, I even used it on my 6v Optima, during winter hibernation (first time was this past winter).
