1500: 12 Volt-1.5 AMP Battery Charger, Battery Maintainer, and Battery Desulfator with SmartTECHnology - Designed for Cars, Trucks, Boats, Motorcycles, Snowmobiles, Jet Skis, Golf Carts

This charger continually desulfates. I use it for 12V rechargeable SLA batteries for backup power. You can leave it on all the time.

Not my normal review, because I just wanted to drop a quick note before I forget to review this like I have so many times.I've purchased two of these BatteryMinders - one in 2014 and one in 2016.In the winter of 2017, my wife's battery on her Infiniti was going bad. There were a few mornings that she needed a jump in order to get to work. I sensed her battery was on its last leg because it was starting to slow crank as well. BTW, I maintain my vehicle batteries at least once a year by checking the electrolyte level and filling with distilled water as necessary after the battery is fully charged.I knew of the so called desulfating properties of this BatteryMinder, so one weekend I connected this to her battery and left it on the entire weekend.I should've replaced that battery, but the BatteryMinder made her battery strong again - I couldn't see why I should replace a 'perfectly good' battery. Craziest thing I've ever seen. Additionally, every few months, I would just connect the BatteryMinder to her SUV battery just for 'maintenance'.That was back in the Winter of 2017 and I finally got around to replacing that battery back on May 30, 2034. *ALMOST 7 YEARS LATER AFTER THAT BATTERY WAS GOING BAD!*I felt I could've just kept doing what I was doing, but I felt I was just pushing the envelope for a battery & frankly I was just being too frugal.The BatteryMinder is an absolutely great investment to extend battery life.

This company makes excellent battery-specific devices for maintaining your batteries. Not only does this product charge your battery, but also it Maintains and Desulfates the battery automatically.Check out the description on the Battery Minder page to see the difference in this device and your cheap trickle charger. With a Battery Minder I have been able to regularly get two and even three times the normal battery life, even in the harsh environment of Gulf Coast heat and humidity.Be sure to purchase the correct application- and battery-specific charger for your specific needs.Well worth the difference in price above the lesser quality and price models.

The backstory is that I apparently own a truck where there's a stupid rubber plug on the brake pedal that can crumble apart in time, close the brake light circuit, and allow the battery to completely drain down to a measured 0V as the truck sits for a weeks with brake lights on. The side story is that the battery had just gone out of warranty, and the replacement plug costs $10 friggin' bucks and took an hour to install. But that's not important here...er, not completely important.After reading a fair amount of comparison shopping for battery tenders/chargers (there's a difference apparently!), I opted for the BatteryMINDer 1500 for a few reasons: 1) needed the desulfator function, 2) costs, and 3) general function/capability. My biggest concern was that any charger I chose wouldn't even do anything for me because of how low the voltage was (no seriously, 0V!). Most chargers either made it clear that voltages less than 10V wouldn't charge.The instructions for the 1500 indicated that it needed at least 3.5V. Hoping for the best, I connected the battery to my other truck (i.e., battery on ground, jumper cables to it), and let the truck run for a while. Eventually I got it just north of 3.5V after maybe 45-60 mins. At that point, I hooked it up to the 1500 and let it do it's initialization cycle. Shortly after, it indicated it was charging/desulfating.I let it sit for a few days, checking the voltage daily. It did in fact charge it up to over 13.5V after about 6 days, I think. Since I don't drive the truck daily, the time was fine, but I was more pleased that it was even able to charge and that I hadn't killed it. We're talking about a battery that sees maybe 300 miles a year, was already 2 years old, used in AZ, and otherwise sits in a truck on the side of the house only used for truck-requiring errands. I'm pleased that it saved me from buying a new battery for an old truck that's rarely driven, and the cost of the unit was acceptable even if for only a 1-time use. Right now I've got it charging another battery...for another truck that's been sitting idle lately.Package includes the charger unit, ample cord length, detachable battery clips, and a screw/spacer for "permanent" mounting (it replaces the screw on your outlet cover). The LEDs are easy to understand, each LED indicating one of two functions clearly shown on the unit's label.I'd recommend the unit if you're in a similar situation. I may even keep the unit hooked up to the truck when not in use.