IEIK 12V 5 Amp Automotive Smart Battery Charger Maintainer for Car, Motorcycle, RV, SUV, Lawn Mower, Boat, RV, SUV, ATV and More

I’ve used it 3 times already (mainly bc I refuse to get a new mower battery). It only takes minutes to charge my mower battery, it’s easy to use and it’s compact. Perfectly packaged and on time delivery.

I had a battery go dead and looked into a jump start option to plug in as I didn't have another vehicle to hook up to for a jump. Well turns out there are few that can do a jump start that you plug in and they are a bit pricey. The way big batteries work and the type of power they use, it is more complex or not a simple thing to take the power from your wall outlets over to a device to jump start your vehicle. I didn't know that until I went looking and reading to learn about it.There are battery powered ones to jump your vehicle, but you would have to maintain them to have the power on standby to do it. I have only had a battery go bad every 3-5 years, and so wanted a device I can plug in to get a jump start if I need one. From what I read on the high priced ones that can do that, they only last a few years, so there would be a chance they would not work when I needed it.That is why I decided to go with this charger / maintainer, it will take over night or 10 - 12 hours or more to charge your vehicle battery with this to get it to turn over and start. But, this little device can sit on your shelf for years and then when you need it, you have it. If you have a emergency or need a fast jump this won't do it, but you can also use it as a maintainer to keep a battery charged, but it will have to be left plugged in and your vehicle hood left up. Such as to use at a vacation home, etc.This was the lowest priced one I could find with the smart technology to monitor the charge and keep things as safe as can be with a more hands off approach. It is not super simple such you could just do it having not read the directions, but there are no such options that easy.You will have to read up on how to charge a battery and or maintain it and become more familiar with it all to both have your battery charged proper to use it and to be safe. As it seems if you over charge your battery it can ruin it or it may explode (I am not sure).All this is why I went with this device, as I can read the directions again in the future when I need to use it and it is simple enough to then charge my battery and go about it smart and safe, so I can start my car the next morning to get to auto store to get a new one if needed.

Easy to use, inexpensive, works like a charm on tractor battery

I bought 3 of these for my fish camp in Alaska. They work very well but the remote monitoring signal is very noisy. Any electronics like radios and walkie-talkies are interfered with its signal. Annoying trying to listen to the radios so I unplug it at times.

Someone left the key in the on position all winter and the lawn tractor battery was dead. I read the few pages in the manual written in English and was a bit confused which “mode” I should use. When I connected it to the battery it immediately went into repair mode. After a few minutes I thought I would just change to charge mode. Well, the battery was so completely empty it reported it could not charge. So, back to repair mode and I left it for 24 hours. When I returned to check the status it displayed “End” which I read means repair is complete so I changed the mode to charge thinking that would be the next step. After 10 minutes it reported battery was full. It worked! Lawn tractor started right up and the battery is alive again. It was so easy and the charger worked great!

A little cheap product, but it’s worth having it in the car just in case you need to charge her batteries or you get stuck somewhere

This was priced low so I wasn’t sure how well it would work. If actually works just as good as some of the other ones I’ve had. It charged my husband’s lawn mower battery in only a few hours. Worth the money so far.

Edit - How do you go from 5 stars to 1 star? That's what happens after you've had some "experience" with this electronic disaster. Though successfully charging my LiFePO4 battery, it was creating so much electrical noise that it destroyed a Icom amateur radio in the process. This $1000+ radio was in the circuit, turned off, with this charger when it was destroyed. (The radio is constantly powered but in a standby mode much like most modern TV sets.) Upon investigation, it was discovered that the electronic circuitry in this charger yields so much electrical interference that it killed the turned off radio. This charger will produce constant over 120 dB static into the atmosphere and into the voltage feed lines. While this charger was turned on, meters on the electronic equipment in the household would go berserk. Midway in this process, the primary internet router failed. It was a bright, sunshiny day with no clouds in the sky so no close lightning strike. This radio had operated for a year previous to this in the same manner but with a lead acid battery and standard charger to supply voltage. If you have anything of value hooked to your LiFePO battery, don't buy this charger.Not only did I use this to charge my LiFePO4 30ah battery but I ran a "Repair" on a 12V lead acid battery that has been dormant for some time and would not take a charge from my normal 10 amp charger. It spent half a day doing the "Repair" and then charged the battery completely. Several days later, it is still holding 12.7V which is perfect for a lead acid battery. One small question remains. It never showed more than 1.5 amps when charging my LiFwPO4 30 ah for the first time so I have a question about it's 6 amp rating on 12 volts.