School me on Lithium batteries

[Camdec]

Hi folks,

I’m considering getting a couple 12v lithium batteries for my 24v trolling motor. I don’t have an onboard charger and the lighter weight and longer run time is really appealing when I’m offloading to charge. I run a fiberglass ski/fish, but like to bottom bounce later in the season. When I use the bow mount trolling motor it may be for a total of 8 hours over a weekend max. From what I see the price goes up based on amp hours, so it’s pretty Greek to me as to what I need. Any recommendations are appreciated.