Lead Acid Battery Desulfator 12V 24V 36V 48V Battery Regenerator 2A Auto Pulse Desulfator

I have an old Worx 36V mower, and the SECOND battery was failing. I thought that it had probably sulfated over the winter, but didn't want to buy another $100 plus, short-lived battery. The Worx battery consists of 3-12V gel cell batteries in series, and I wasn't sure if this gadget would work. But for 20 bucks, it's worth a try. Initially I had around 37.5 volts after charging the battery, pretty weak. I hooked this desulfator on and let it run overnight. It selected the correct voltage and did its thing all night long. I recharged the battery and this time I got 39V, much better. I ran the desulfator again overnight and recharged the battery again all day - this time I was up to 42V, just like fresh batteries. It definitely works - on lead acid batteries (gel or regular). I am glad I bought it, and plan to keep in the toolbox. I have some older deep cycle 12V batteries that have sat for a couple of years that I want to try this on. We'll see, but I have faith!

I've had this for over a year now and it's still kicking. I've used it on 5 batteries now and it saved all but one. Which I knew was trashed just gave it a shot.First batter was for the riding mower.It would start it three to four times fully charged.After two discharge cycles with the desulfator it's over ten starts. I never tested it beyond that but it works as a new battery should.Second was a car battery.To be fair this car has a gremlin but desulfating the battery solved enough of the issues to help diagnose the real issue. (sketchy ground on the alternator)Next up was the motorcycle battery.I figured I would give it a shot. I didn't know the age or history of the battery as the bike was bought used. It is a sealed agm battery and it made a world of difference. If I left the ignition on for more than a few minutes. It would slow crank. If I didn't drive it long enough to recharge the battery it would die. Now after running a few cycles with the desulfator it acts like new. I did buy a new battery just in case and swapped the old into the smaller 250 (can't risk getting stranded, the 650 is the daily driver). So far so good. The revived batter cranks for days on the 250. I'm setting the carb up and that requires a lot of starts and restarts and starts and restarts.Bottom line if the battery can be saved this will do it. If it can't, this won't. But a couple bucks to save you from spending 80 or more each time a battery goes flat is worth it. Especially if you are like me and own 20 things with batteries. (insert time the tooolman grunt)

UPDATE 7/15/2018:It took a while for me to get an opportunity to use this device in a real world test. I am completely surprised and shocked at the improvement this device made on several batteries. Initially, I used this on several small 12v batteries made for scooters. They seem to be better, but I just didn't know how much, or whether it was from using this device or just general charging. Now, I have a 12v AGM jetski battery that was holding around 5.6 volts consistently. It would charge to around 11.9 volts, but would drop to 5.6 volts after a day of sitting there undisturbed and not connected to anything. I decided to charge the battery to 11.9v and quickly attach this device to let it do its magic. After it stopped running, I charged the battery again, and this time the battery seems to hold charge around 10.x volts. Wow! I'm amazed at what it did in the first run. I ran it through a few more charge and desulfate cycles, and have decided to let it sit for a week to see if it will keep its charge. Will report back soon. This device did not come with any documentation on how to use it and what to expect, so I'm dinging it 1 star. It appears this $20 desulfator device actually saved my 12v AGM battery, while the other $50 charger/desulfator combo device I bought ruined my deep cycle 12v battery (*not; see 8/6/18 update; desulfating can drop electrolyte levels and needs to be replenished). My next test will be to see if this device can fix the deep cycle battery ruined (*not) by the $50 charger/desulfator combo device.UPDATE 7/31/18:I found that the first time I used this on the AGM battery, the battery seems to work better (maybe a lot better). After a few cycles of charging and desulfating, I found the battery condition worsens and now not retaining its charge as well as the first few times of desulfating. My recommendation is to use it only once or twice on a battery, as there appears to be a declining benefit and possibly a negative affect after repeated uses on the same battery. I will do more testing and report back.UPDATE 8/7/18:After more testing, I discovered something that is not mentioned in the non-existent user manual. In the process of desulfating, this device may cause some of the battery solution/electrolyte/sulfuric acid) to evaporate. Adding water to replenish the electrolyte appears to remedy the problem of battery charge retention. So be sure to add water if the battery's cells look dry or low (see provided photos). Be careful doing so, because sulfuric acid is very caustic and getting any splatter on your body or in your eyes has damaging consequences. I read that AGM batteries have a catalyst plug to convert evaporating gases back to liquid; although I believe that system did not work on my AGM battery. In conclusion, this desulfating device and the other $50 desulfating charger appear to both do their job, with some intervention required when battery solution/electrolyte is lost in the process.ORIGINAL POST:I wish I could say something great about this product or something bad. Unfortunately, the way this products is designed, it is hard to tell whether this device actually works or not. In practice, it takes a long time to realize whether the technical marvel of desulfation technology is having an impact or not. Something is happening and energy is being consumed in the process, but does it prolong battery life?---We probably won't know any time soon. I thought this device would charge the battery while it is desulfating the battery or immediately afterwards (automatically), but it only desulfates---so the battery must be recharged multiple times in order to achieve the desired effect. I do like that it can do 1-4 batteries connected in series. Honestly, I'd rather get a device that does it all (and no manual intervention; i.e., where I don't have to manually charge, desulfate, repeat). So, I am ordering another item from Amazon that promises to do exactly that...

I bought this to rejuvenate some badly sulfated batteries but guess what? If your battery is sulphated and cant produce 12 volts then this device wont turn on and operate. My battery is 11.8 volts. So you have a desulphator that doesnt turn on and work unless your battery is in pristine condition and doesnt have any sulphation. Yeah, that makes sense. When I put a 12v supply across the battery to help turn this thing on it doesnt do anything to the battery to help. Weeks have gone by pulsing with absolutely no change. This thing is a scam and a waste of money.