Good reference here on brands and battery mfrs
https://forum.ih8mud.com/threads/battery-information.610857/
Another vote for Deka, or East Penn, AGM batteries. At least for small 4 pots, they seem to start fine even after long periods of sitting. Pair them with one of those portable jump packs.
ETX30L is the largest AGM they make in that line I believe
http://www.techbatterysolutions.com/Deka-ETX30L-Battery-p/etx30l.htm
