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

This is a nice little charger, great for the price. This is simple to use, works well and afordabe. The wires are a little cheap, but for what it is, its great. I have it connected to a 12v lead acid that runs my well pump (6a 12v) and it works great. I connected it and have to do nothing now. Great purchase!

My 6-year-old Audi Q5 can start OK, because it has a strong starter (has auto start/off) but because of it's low state of charge, that function no longer works. I bought a trickle charger before this one which charged well on a 2019 Corolla that's being driven very little and infrequent but not on my 2018 Audi Q5. That other trickle charger charged my battery from 11.7 to 11.9V. I bought this charger due to it has a separate mode for AGM and Repair because my Audi battery is AGM. FYI, manual says you need to wait at least an hour from the last usage of your battery. So, I first charged it in the AGM mode and the display went from 50% to 100% in only 10 minutes but the voltage only improved to 12V. Yesterday I put it on repair mode, and it took 8 hours to show full. I did not wait for it to turn off by itself. The battery now has improved from 12V to 12.55V; from 50% to 80% capacity on a 6-year-old large AGM battery. I did not bother to remove the power cords due to my bad back and the battery is situated in the trunk all the way behind the backseat. Luckily it does not appear to cause any damage to my car. During the repair mode, I monitored the battery temperature with my laser thermometer; the charger nor the battery did not get warm and stayed in the low 70's. PROS: 1) Has separate AGM and Motorcycle and repair mode. 2) Great LCD lighted display will show the battery level when you hook it up even before you plug in the power cord. It will also show charger temperature, charging current & status, battery voltage & etc. 3) Smart charger has a built-in fan to stay cool and it will alter the charging power with respect to the battery status. It will start out slow and rarely goes to the full 10A, then it will decrease the power when you reached half full then even lower at 75%. Even when it's @100% charged, it will trickle charge to the max then turn itself off (fan off but light still on) and display OFF. 4) Great repair mode that reconditioned my 6 year old AGM battery from 50% to 80% capacity. 5) Very good price; I paid $24 shipped. CONS: 1) Very short cord, you will need an extension cord. But it's no big deal. 2) Per owner's manual, in Motorcycle mode, it will charge battery to full then turn off and turn back on when voltage drops below 12.5V. But does that mean you cannot maintain your battery in the other modes? It also states not to leave the charger unattended over 12 hours. Therefore, I don't think this is a battery maintainer which is fine for me. ................................................................ With this battery charger, I can charge my batteries before and after I go on a vacation and let not my batteries charge level go down too low thus prolongs the life of my batteries. I only had it for a week and so far, I am very happy about this product. I will update if the charger quit or have some problems.

This little thing works great! My car battery was dead this morning. Ordered it and received it within hours same day. Only charged less than 10 minutes and car started with no problem. It's small enough to keep in my trunk just in case I need it again in the future.

Charger is saving me from replacing a battery. I had an older charger that would simply say the battery full. Turns out the battery was at 11.9 volts and would not crank. This charger told me the true voltage and then charged it fully. I walked away and forgot it for a few day. I came back to find it turned itself off.

I had a vehicle sitting for a few months and when I went to unlock and start it I couldn't even open the doors due to a completely dead battery. I was able to use my key to get it open and tried jumpers to get it going but wasn't able to turn over. I then went in search of a charger that could recharge my battery and get my car back on the road. In the searching process, I learned that chargers will not charge a completely dead battery and that it's best to find one that had a "repair" function. After finding a few and carefully sifting thru feedbacks I decided on this unit. Mostly because of the versatility of battery types but also for the "repair" feature. I received the unit the next day and decided to try to charge the battery first. It immediately showed full and shut off. I knew this wasn't the case and figured it was because of the completely dead battery so I flipped it to "repair and let it run about 18 hours til it showed done. I then switched it to charge and it was showing about 60% charge so I left it to charge for a few hours. Once it showed done, I left it on charge and let it go this time for just under 2 hours til it showed done. I put it back in the car the next day and it started right up. I let it run a bit and shut it down. I started it again the next day and same result. Started right up. Needless to say I am very happy with the results this product achieved. The price was very affordable. This was done on a 12 volt "flooded" or "wet" type battery in very cold winter weather (teens) over 3 days. Make sure you are positive what type of battery you have or you may not achieve expected results. Definitely recommend!

I bought this because I have a battery on my generator that has been dead for about a year. I used the repair mode and after approximately 6 hours, the battery has a full charge and is holding the charge. It is compact and very easy to use

What a find! This trickle charger has rejuvenated my mower battery. Its repair function brought it back from near dead. Its step by step charging feature and easy to read screen is pure quality. five thumbs up.

A great charger at a great price.

Good product fast charging

Needed a battery charger to help restore a car battery that was really low. Saw so many different options and pricing for models that I didn't know where to even start. Then I saw how many people bought this little charger and raved about it. For less than $40, why not give it a go? So happy I did. This charger is amazing. Plug and play and so simple to use. Took a few hours but got my battery back to 100% with the bonus repair function built right in. Have used it to repair and top up other batteries as well. Totally satisfied and already recommended it to a buddy to buy and he is loving it as well. Great purchase!

Brilliant. Jump started a car that had been parked off for months. Drove it around long distance and the battery did not hold a charge. Bought this charger and it restored / repaired the battery.

Produto muito bom, recomendo