I have a 55lb I-Pilot on my 16' aluminum and I run a single 100ah Dakota Lithium for the trolling motor, lights (seldom used), bilge pump and accessory outlets. The only time I have ever been below 50% after a full day of fishing is when I had forgot to charge the battery the night before. Like go4Big Fish, I push with the outboard and steer with the MinnKota.