[frnkeore]

I use 35 Ah, SLA battery's (sealed lead acid) on some of my vehicles. They are small and very powerful, for their size. You have to use a bolt and nut connection, rather than a post or, I'd have them in everything. Most of those jumper, starting battery packs, only use a 18Ah, SLA battery in them.

The Optima's are AGM battery's (absorbed glass mat), they are very similar to the SLA's, in size and power.

A 100 Ah SLA or AGM, will be more than you need and will out last a standard battery at least 4 times.