I was having trouble with my trolling motor speed, a Minn Kota Edge 55 lb thrust. 12 volt system. While running full speed on 5 it would sometimes kick the breaker. In addition it would run awfully slow. I checked all of the connections in the motor, foot pedal, and battery. All were clean and tight. I then checked the wiring and breaker. According to Minn Kota I need at least 8 AWG cable/wire and 60 amp breaker. What I had looked like 10 AWG and 50 amp. I made the change and had no more problems kicking breakers. I gained about half a mph. But the speed doesn't last. Last time out I limped back to the ramp (electric motor only). My battery appears to be a Wal Mart brand, deep cycle. It is dated 6/19. When charged and I use a load meter it says it is good. There is no fishing line around the prop. The boat is a 1648 with a 40 HP on the back. Usually it is just me and the dog. Even though it tests good could it be the battery? Is age catching up with it causing a quick discharge? All of this happens in about two hours.