Still running the stock pro guides, boat was new in May 2020. Standard dual pro charger 6x3. My graph at the helm shows me the battery had 13.3 and 13.6 volts on full charge, but after 6 hours fishing, almost no running, my cranking battery was dead. It used to last for 10 hours no problem. The trolling batteries still seem good. Thinking about an optima blue top 31. This is for cranking, 2 helix 9's, and a mega 360. Any advice or feedback is appreciated.