YONHAN Battery Charger 10-Amp 12V and 24V Fully-Automatic Smart Car Battery Charger, Battery Maintainer Trickle Charger, and Battery Desulfator with Temperature Compensation

I was hesitant to try this, but it performed flawlessly. Not only did it charge two completely dead batteries, it revived the 14 year old one in my mower. No, that is not a typo. The date sticker on that battery is 2009. This year, after pulling the rider out of the shed, it seemed a drive to buy a new battery was inevitable. Jump started the engine to at least get the lawn cut, then ordered this charger with hopes of saving about $100. It worked like a charm. The next surprise was a moped, left connected in the frigid temps all winter long. This charger also brought that back to life. After that, our camper battery was quite low. No problem. Hell, it even brought 8V back to a battery that had been sitting dead for 20 years! When my truck starts cranking slowly, I'll attempt to save $275 on that one, as well.I have no idea what people are doing wrong to make this a "frequently returned item". This charger couldn't be better for me.

Honestly, this is the perfect remedy for those who live in cold weather, skip long in-between driving your vehicle. The charging module is simple to use...1. you simply plug it into an extension cord. 2. Press the "mode" until the light indicator at the bottom is lighted under the correct symbol. 3. Connect the negative and then the positive and off you go...it's that simple! The battery light gauge shows where your battery life stands and where it's currently charging. It even shows the output of power and temperature which is an easy to read and understand. Very simple and high quality! I used it on both my Toyota Tacoma battery. One was a brand new group 35 AMG battery and the other was a group 24f 5 years old regular battery. On the AMG battery, it took about 1.5 hours to charge my battery from 80% percent to 100%! On my other regular battery, it was a little quicker but I doubt that battery could be 100% since it's fairly old but the module was able to figured that out. Awesome product, simple to use and effective!

I have a '99 Ford 7.3L Diesel. The PCM computer went bad from rain that leaked water through the driver's side windshield. I put a new high amp alternator and 2 new AGM batteries - and the truck died 15 miles out - batteries completely dead. Towed it home - hooked this battery charger up and it slowly pulsed a repair, then, in a digital display showed the Volts, the FUL symbol when complete. It took 6 hours, but I was confident that the battery was re-charged. After I install the new PCM, I plan to take it to a shop for a high-end scan. Small enough to keep the charger in the truck.

Why did you pick this product vs others?:I was looking for an affordable smart charger. Generally you can’t bring a battery back from being completed dead. But this one did. And it was a worn out battery and I knew that. I just thought I’d see what this little charger could do. After it analyzed its condition it took the correct action. It’s not super powerful, but it works. My only complaint is the barely informative info included with it. It showed several codes and there’s nothing to indicate what they mean. That was a little frustrating. The extremely short cables are a bit of a nuisance as well but I’d recommend it anyway.

My lights weren't turning on, nothing. My clicker wasn't unlocking the doors. This is my secondary car that I barely drive so the batteries always dying. It actually worked. You plug it up and don't touch the button. Just connect it to your car battery first then to the powered and let it sit until it's fully finished, it will cycle through by itself . It took a couple hours to fully charge. I tried the clicker and it worked, then filled with nerves I went to start my car and it actually worked. What a cool little invention.

Why did you pick this product vs others?:A must have in your car. My car battery reached its warranty limit and wouldn't you know it, my car wouldn't start. Got this baby and you know what, it recharged my out of warranty battery. I'm still running my car on my same battery now for over two years. Found out about this product from a friend and it worked so wonderfully that I told a co-worker about it and he bought one! It even fixes your battery acid levels! Ladies and gents too, buy this product and save yourself some money!

It's kinda unbelievable, when you see it it looks like a toy...its not ,my battery had been dead a month, I bought this as a shot in the dark..1 hour..1 hour and I was driving again, engine turned over with not problem whatsoever, and the charge is holding strong... Buy it.. just buy it.

After having this 10amp charger for a few months. It's definitely worth 5-stars! It charges the battery, and it's 10amps you can plug it into almost any outlet without worrying about it blowing a fuse.What actually did really impress me which makes it deserve 6 stars is the pulse repair. I honestly thought it was BS but can/have verified it worked! Not by its own led screen but by multimeter and obd scanner (which made me realize it then I double checked with the multimeter)...Super happy and thankful the cheap price didn't coincide with the quality!