I normally have a Battery Tender Jr hooked up to the garage queen, which usually sees one or two trips per week. My batteries last six or seven years (on my fourth since Oct 03). I use the Duracell 49/H8 flooded batteries from Sam's Club, 900CCA (04 4.4i).

I recently got the Autel BT506 because Gemini Pro said it would work on the engine bay battery terminals. AI lied. So, I'm thinking about checking the hard way because the current battery is about six years old.

https://www.aliexpress.us/item/3256809815963828.html