On 4 for 10 hours you wont even draw a 50ah down past 70-80% remaining. I know because i run them trolling for crappies/walleye. Also on 4 im going almost 2mph with lithium, used to be hardly over 0.8-1.2mph with lead acids.

If you are running on 3-4 now, youll be 1.5-2 setting with lithiums im sure, hardly drawing more than an amp.

You absolutely do not need a 100 or 125ah IMO.

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