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

Excellent, Excellent battery charger. It charge a a REAL DEAD battery. I recommend this charger to anyone who doesn't know twits about charging batteries. Considering the cost of $350 for a new battery, $23 is nothing. Plus it always around for charging and maintaining other batteries in house, that is a plus. I charge my battery overnite after receiving charger, This morning I have a fully charged battery. Time to test it out on car drive.........$$$$$$$$$$....LOL...LOL...instruction manual is to small for these bad eyes, so go to Utube for video instructions. thank guys.

Needed this quickly to check parent's car battery. At first thought unit broken as wouldn't go above 12.1 v on old battery but that was because the old battery was out of warranty and needed to be replaced. When tried charger on new battery read about 14.6 V which is good and indicated new battery was almost fully charged. The instructions are limited but basically just hook positive then negative cables to battery and if battery has any charge the display should show after about 20 seconds. Next plug charger into AC outlet and should start the charging process as described in directions (desulfurization then trickle then ramp up to full charge). Be sure to press the MODE button to put charger in right mode like STD for standard lead acid batteries. When done should say FULL or FUL then unplug AC plug then disconnect negative then positive cables in that order from battery. Can't speak to recovery option for charger but not really looking for that feature just something to check battery and charge it if possible. Basically charger is doing everything automatically.

The modes on the charger can be a bit daunting, but the pictures in the listing do a good job of explaining them well. Taking off a star since I sometimes get to the charger and see that it is "Of", meaning "Off". This is confusing to me as I don't know if it abandoned the charge cycle, or if it completed successfully.

Brilliant little charger, had read a lot of reviews and the people are correct this is a great little charger. My jeep and mini cooper had been sitting since October last year and this charger brought them back to life .. I tried to charge them with other chargers and they were still dead. Put them in charge overnight and the next the cars jumped in to life .. wow great charger and an excellent price , was looking at around $400 to $500 for a couple of batteries .. brilliant product guys ..

I'm a mechanic at a rental company. I've used this charger on all kinds of batteries. I have a few of these at work and one I use at home. Let's be honest. This charger is cheap. I didn't expect much. Using an amp clamp meter it puts out just over ten amps. Plug it in, walk away. When it's done it says full and then turns off. A good band for the buck.

I was so disappointed when I open the package and saw this itty bitty thing. I thought about returning it on the spot. BOY WAS I WRONG!! This little guy packs a punch! I had a completely dead car battery and this little guy completely charged it back from death door. I am impressed!

Purchased over a year ago to have "just in case" because the price was right. Used it a few weeks ago to diagnose repair and charge my truck battery. Let it run overnight in the garage 9-10 hours. It switched the charging off when completed. PERFECT for a first use.

I needed to charge my lawnmower battery that’s been sitting for a while, but it wouldn’t give it enough juice and I charge it for two days to make sure but it didn’t work maybe for a new battery is not so dead but car battery is dead. It don’t work need more juice