Reddit reviews VMAX MR96-60 AGM 12V 60AH AGM Battery Deep Cycle High Performance Battery for 24-50lb Thrust Minn Kota, Cobra, Sevylor and Other Electric trolling Motors (Group 22NF, Upgrades Any 55AH 22NF Battery)
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12 Volt 60Ah AGM SLA Marine Battery 9.2"L*5.5"W*8.3"H Heavy Duty 12V AGM DEEP CYCLE BATTERY with Float Service Life span of 8 to 10 years.CARRYING HANDLES for easy handeling. Electrolyte Suspension system VMAX tanks utilize an electrolyte suspension system consisting AGM (Absorbed Glass Matt) of a high porosity that totally absorb and contain the electrolyte. No silica gels or any other contaminants are usedMilitary Grade Plates provide an extra margin of performance and service life in either float or cyclic applications, even after repeated over discharges.Maintenance Free Operation: There is no need to check specific gravity of the electrolyte or add water to VMAX tanks during float service life. In fact, there is no provision for this type of maintenance.RECOMMENDED CHARGERS: VMAX BC1207 OR BC1215 12V 15Amp 7-Stage "Smart" Charger/Maintainer OR VMAX BC1205 12V 5Amp 4 Stage "Smart" Charger/Maintainer
Throwing together a lazy quote here.
I'd recommend a battery of this size, plus a trolling motor pack to make it easier to charge and it's overall a good idea imo.
A group 22 trolling motor pack will run you about another 80-100 dollars
Then a trickle charger that will charge it over night will be about 50 dollars.
This alone runs you around the cost of a small generator, without thinking about replacing the battery, or getting a backup, for those really hot days.
There are a lot of unknown variables as well, like potential cell damage due to overheating, and longevity of the cells within the battery as well.