12V 24V Car Battery Charger & Engine Starter, 0-50A Automatic Battery Maintainer, 250 Cranking Amps, Jump Starter & Smart Trickle Charger, for Standard, AGM, Gel & Deep-Cycle Batteries

Great charger !

My first impression pulling this out of the box was what did they do to the power cord? In several spots along the cord they used either a blade or a grinder to take off chunks of the cable apparently to remove certification markings. This is concerning because it makes me wonder if the components of this charger were already used or if this entire unit is some kind of a factory second. I did plug it in and try it out but did not leave it alone when charging. It did work well and provide a good trickle charge and the indicators lit up correctly when faults were presented in the set up. The design is nice overall but build quality is mediocre at best. The metal feels flimsy and footing was uneven. It doesn't feel very heavy which makes me wonder about the internals as well. I ended up throwing this charger in the trash as I did not trust the build quality - especially the cables that had been hacked on.

I had issues with voltages reading off when it is not charging but once it starts charging it shows proper voltages. It properly charged both an AGM and lead acid battery and did it well. It was easy to use but it does things that kind of make me wonder as it doesn't properly power off. Like the display and stuff will flash which I was told by the seller it is how they discharge the capacitors. The voltage being off seems like it could cause testing to be wrong unless you have a separate volt meter as well. The other issue is the fans run constantly even when it is not doing any actual charging or anything so it wouldn't be able to be used in a area where conversation must be had often. It's not large or anything but fees like if they gave it a little bit more effort it could of been much better.

The AZZUNOX 50-Amp Battery Charger bailed me out after I accidentally left the overhead light on in my car for over 24 hours. We all know what comes next. Yep, dead battery but, this 12V/24V charger came to the rescue and powered up my car battery fast! It's super easy and intuitive to use. Pretty much plug and play.It also has smart trickle charging to keep batteries healthy if you know they're going to sit for awhile. The clear display is easy to read, and it’s compact enough for my trunk and takes up little space in my garage. At the time of this review (June 2025) it had a 10% off coupon, making it easier to buy.

This is a good battery charger. Was a little confusing at first. But once I got the hang of it, it was easy. Charges very fast and I like the way it tells you if what your charging is at full.

Charger did not work. Drained battery not charging it. Also starting boost didn't work either. Item also kept tripping the ground fault on the outlet it was plugged into.

The AZZUNOX 50-Amp Battery Charger exceeded all expectations. It’s powerful, smart, and versatile—handling both 12V and 24V batteries effortlessly. I used it on my truck and marine battery, and it brought both back to life quickly. The 250 cranking amps really help in a pinch, and the trickle charger feature makes it perfect for long-term maintenance. The build quality is solid, and the digital interface is clear and user-friendly. A great tool to have in any garage or workshop.

Apparently, this was once certified in ways it isn't anymore. They just ground the certification marks off of it. The problem there is that the certification marks are in the cable insulation. You kind of need that. They ground through the insulation. That is going to cause problems down the line, and could potentially make it dangerous right now.The build quality here is middling. It doesn't feel like anything all that high quality, but it doesn't feel incredibly cheap.It works just fine. I managed to jump start an old tractor that had a rather dead battery on it. It started it up without issue.The cables are long enough for most applications. The clamp seem reasonable in quality as well. I haven't damaged them by using them yet.This would be fine if they didn't grind through the cable. That is one of the strangest things I've ever seen. It's obviously not just mine, considering other reviewers have seen the same thing. You might want to check yours if you have this.