I have considered purchasing one as a maintainer and batter life extender. I know the process works to restore commercial batteries such as forklifts and scissor lifts but the equipment used to recondition them isn't $50 and some batteries if not most require the sulfuric acid in the batteries to be balanced as part of the reconditioning. What I don't know is if the battery minder, battery tender or other sub $60 desulfators work as advertised. Anybody using them and getting the results as advertised?