BatteryMINDer1215C: 12 Volt-1.5 AMP Convertible Multi-Use On-Board, Benchtop Battery Charger, Battery Maintainer, and Battery Desulfator - Designed for Cars, Trucks, Motorcycles, ATV, Boat, RV

Both the product and the customer support!Works like a charm. Engineering is flawless in both hardware and app software. A class act. Jason is knowledgeable and very easy to understand his instructions for bulldog value intrgration and operations. You will not be disappointed.AC

It revived a $265 Yellow Top Optima battery that a "Pro Shop" said was beyond help. It took 8 days of desulfating, but it now is taking and holding over 87% of the charge of a new battery. I took it back to that shop. They tested it and they were amazed at the results. They looked on the bottom of the case for their mark to be sure it was the same battery. They said were glad I didn't buy a new one, and if their customers can wait, they will start leaving batteries on their desulfator much longer than in the past. They have free loaners, so they will make more space available for longer times for more batteries to desulfate. They were just trying for two days before I told them how long mine took to come back to life.

I have a travel trailer with a built-in three stage converter. I thought it being a three stage would be sufficient. Nope. I've boiled off three standard flooded lead-acid batteries relying on the built-in converter to do a good job. Yes, I could have been more diligent checking the water levels. But batteries should not get boiled below the top level of the plates in two months' time (I checked the levels and all were level, then went camping two months later without checking again only to have the batteries DEAD due to the water levels having been boiled off).I have now had the BatteryMinder hooked up to the new batteries on my trailer for just over two months and the water level has not appeared to budge. Wow, batteries being maintained AND desulfated without any boil-off. Awesome!

Super replaced older much larger device by BatteryMinder that died after 5 years extreme use. This is very simple to use, small and easily placed near the battery. Has very clear indicators on what is doing. Fully automatic requiring no selections, or settings.

who knew batteries has to be charged all the time and maintained. works great and I noticed my fishing time on the lakes are long with the same batteries I had for the trolling motor. A+