NEXPEAK10-Amp Car Battery Charger, 12V and 24V Smart Fully Automatic Battery Trickle Charger Maintainer w/Temp Compensation for Truck Motorcycle Lawn Mower Boat Marine Lead Acid Batteries

This charger is easy to use and works well. The smart charging modes and temperature compensation are great for maintaining battery health, especially in changing weather. It’s compact but feels durable, and the digital display is a helpful touch.

I've used it once to charge a car battery after the car sat for a long time. Worked well (took ~ 8 hours, the messages on display made sense). Hopefully it will work the next time I need it (once a year?). But a good purchase for a very reasonable price.

I bought this battery maintainer/charger for my cars. My Mercedes has an AGM battery; this maintainer has AGM battery charging portions with standard and other battery options built in. I changed my Mercedes battery to 100% today, and now I am charging my Sienna battery. The only complaint I have is that the cord to the wall outlet is too small. It should be 5ft or so. It is very easy to connect. The RED clamp connects to the RED port of the battery, and the Black clamp goes to the earthing port. I give you a percentage for he change where you start, for example, 40%, then flash to 100%, unit battery is 100% change. After full changed, a FULL sign appears and the fan stops and charging stops automatically.Thanks!Manny

Basic charger, had to reset the unit on the first use, selector would not switch from one type of battery to another. After the initial reset, the unit functioned properly. Long term durability is unknown, To reset the unit simply disconnect the ground lead to the battery and then hook it back up. Hope this helps.

Works really well with camping batteries. Lets you know when it’s charged. I would buy again.

I love that it's smart and fully automatic, and perfect for both 12V and 24V batteries. With multiple vehicles and even the boat, this will be an absolute lifesaver for keeping everything topped up, especially during the colder months when batteries can be a bit finicky. The temperature compensation feature is a really nice touch too!

Charger works just fine. I like the ability to choose the charging amperage if I want to charge batteries a bit more slowly or quickly. Initially, I tried charging a lifepo4 battery that was reading 3.2v with my meter, but the charger would not start despite the manual stating that the minimal voltage was 2v. No problem, I just hooked up a small solar panel to the battery and after a few minutes it was good to go. The charger is light weight, but not too light, and seems fairly well built in a reasonably small package. Time will tell how durable this charger is but I don’t foresee any issues.

I have PTSD from the number of times I've gone to start my old car and it wouldn't start... Okay, maybe not PTSD, but it's made it to where I get pretty anxious every time I go to start my car. I have since bought a different car and although it has yet to not start when I go to turn it on, it's still something I'm dreading and something I expect to happen all the time.So, I bought this thinking it was one of those chargers that you turn on, hook up to your battery and start your car and it jump starts your car for you in a matter of a few seconds, if not immediately. I bought this, charged it up and kept it in the trunk of my car for if and when I needed it. A couple weeks ago, I was walking into the grocery store when a guy came up to me holding jumper cables asking if I could pull my car up next to his to jump it and I said "I can do you one better!" t the store and when I came out and was walking to my car, there was a guy in the parking lot with a dead battery who needed a jump. He asked me if I would be willing to drive my car over to give him a jump start and I said "I can do you one better!" I grabbed the charger from my car and was actually really excited to give it a try and see this baby in action. But we get it hooked up and nothing happened. I was disappointed but figured I must have been sent a defective one. When I got home, I told my brother that it wasn't working and asked him to take a look at it. That's when he informed me that the reason it didn't work is because it's a trickle charger. So basically it's a charger that is meant to me plugged into a battery at all times, or at least for an extended period of time. It is not the type of charger that will jump start a dead battery. I am thankful I discovered this the way I did and that it didn't happen when I was stranded alone somewhere with a dead battery. I think that the seller should make this information obvious. I searched for "car battery jump starters" and this is what popped up, so I was under the impression that this is exactly what this was. They should really clarify exactly what this is and what function it serves and make it clear that this will not jump start a dead battery.So yeah, just be advised that if you're looking for a charger to jump start your car, this is not it. Avoid buying anything that is a trickle charger if you're looking for something to jump start a dead battery right away.