I put 2 of those beasts in the bow of my 1648 two years ago for my 80# Terrova Ipilot. I got mine from BatteriesPlus. Last year Cabelas started offering the same battery (labeled for them of course, like Sears now does). Truly monsters that don't know when to quit. I can launch in the Wisconsin River, fight the current for 4-5 days without ever plugging in the charger & never lose more then one light on the Terrova battery test light. I am always using the auto-pilot & SpotLock so they get a huge workout every time out. Biggest difference between retailers on that battery is price ($290 at Sears, $360 at Cabelas, $370 at Batt+) is warranty. Sears=3 yrs, Cabelas=4yrs, Batt+=FIVE yrs!!. That's a non-prorated warranty, FULL replacement! Let's see Optimas beat that..LOL
My brother runs a Batt+ so I got mine for $305@ and can guarantee you, they will be found "weak" at 4.5yrs and replaced under warranty so they were a 9-10yr investment..LOL. Best damn battery/warranty going. BPS & Cabelas standard AGM warranties are 6 & 9 months last I checked. Plus at 75# each, they do one heck of a job keeping the jon boat bow down at takeoff..I usually fish alone with my 280# carcass on the 25hp tiller so bow lift "was" an issue in shallows, not anymore!