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Message: <blockquote data-quote="Still Afloat" data-source="post: 518402" data-attributes="member: 32426">Hey Boogman, does that motor have have electronic speed control (ESC) or is it one of the older units with the resistor speed control?  Minnkota refers to the ESC as a “Digital Maximizer.”  The resistor type is just called, “adjustable speed control.”The reason I brought this up is the non-ESC motors will discharge the battery much faster and you may need to oversize the battery in this case.  If it has the “Digital Maximizer” a 50 A/hr LiFePO battery is plenty.  If not, a 50A/hr will still work but a 100 A/hr will provide better run times. At this this point the LiFePO batteries are similarly priced to lead acid, they perform better and they are a lot lighter.  The only reason that I’d buy a lead acid deep cycle trolling battery at this point is if I did a lot of winter fishing and the battery was not easy to remove from the boat for charging at above freezing temps.</blockquote>