We run a 80# Ulterra on 2 Duracell AGM 31 batteries bought from Sam's. In addition, we have 2 Duracell group 27 AGMs, one for starting, boat lights and accessories and the other a deep cycle for Electronics. We go from Light till after dark. Mostly trolling. Never ran out of juice. The 27 running electronics died just after a year, and the local Sam's replaced it with a new one. They each have their own chargers and are plugged in when we get back and kept on until we go again.

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