I purchased this for my trolling motor as my brother kept on me about getting a battery charger - marine type. Anyway, it works just great and from my perspective, no second guessing, just simple hook it up and forget it! I now have the confidence that I am not overcharging, that I won't get stuck out in the middle of our lake with a drained battery and that my brother is now a happy fisherman as he comes up to the lake and uses MY pontoon and trolling motor which now always has a fully charged battery!!!! Hooray for simplicity and excellence in quality!