The Noko One is amazing for its size! Great for over-nite charging and trickle functions. And the desulfator feature, although I cant speak to it, seems Genius. I had a lawn mower battery so DEAD it wouldn't register on my large fast charger. By using Force Mode ,the battery BEGAN to charge! Once it has charged for a couple of hours, I will try the fast charger again. Small but full featured, this is PERFECT charger for the Price! Charges Lead acid, AGM and Lithium battery's including 6 volt! Diagnostic funtions I would think only on Shop chargers! I think this would be perfect for boats sitting a while between uses and I use it on the stand-alone battery for my car trailer winch! Noko out did themselves on this for the money!