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

Best $20 you’ll ever spend! If you’ve had as many cars out of commission for lengthy periods of time as we have, then you’ll have to deal with dead batteries. This thing will fully charge up a battery overnight. Multiple times. It’s revived our older vehicles multiple times. Just plug it in, and the device’s computer does the rest: determining what type of battery it’s working on, how to repair it, and how long to charge it back up. It turns itself off when all is done. Regarding the “frequently returned due to comparability issues” warning: that just means people are using it incorrectly or didn’t read instructions well.

Great compact battery charger! Unlike other brand competitors, this charger will will work on batteries completely dead! Fast too.

Its worth every penny. I have used this charger on several cars where the battery was dying but it repaired them. My neighbor had a pickup truck that sat for several months and the battery died. They were going to spend $400 on a new battery and I told them to let me try and repair the battery with this device. After using the Repair mode it may have taken 24 hours to cycle through, but the truck started and it still cranks. I do believe that if a battery is relatively new, it can rejuvenate the battery. But if a battery is actually dying it will delay the inevitable. The only issue that I have is that the clamps are small and barely seem to fit around the standard battery posts. But other than that, for the price, you cant beat it.

Incredible product, with many modes except its has (1) major weakness. It has multiple modes but unfortunately the info display has NO BACKLIGHTING making it very difficult to check and see what mode the charger is in. Fix the display, and the product should be a big hit and seller.

This works excellent as a charger or simply to keep a battery topped off. It can accommodate float, sealed and lythium batteries.

Great product, great price. Have only used it twice so far, so I can't tell if it will last (it is very small and light weight compared to other chargers I've had), but so far, so good. REALLY like the display- cycles through temperature, amperage, voltage, and % full. Fully automatic, easy to use. Attach it to the battery and it does the rest.

Best $20 I have spent!! My car had sat several weeks without starting it. I went by the directions and did the repair mode until it said finished, then began the charging until it said finished. My car started right up and I’ve even tested several more times and it’s still starting as it should. This product saved me $300 on a new battery!!

This charger is amazing. It is very easy to use. What I really love is that it shuts off without over heating.

A great charger at a great price.

Thank you Amazon.It works well and hope it will do till future.

What an amazing product. Nothing to complain about. The price is right, it does the job well, charges fast and it is powerful. Thank you.

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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.