I knw this topic has come up before, but technology changes every 5 minutes. So, what is the "current " best on board battery charger out there? I have a NOCO 4 bank that I am happy with at 2 years, but the winter is not over yet. I want to put 5, 10 amp banks on board. and will need to add a charger, not sure which one. Heard good and bad about MK, and the others are not impressive by most accounts, as I see about a 3 yr life on all brands. Any ideas??