CTEK - 40-206 MXS 5.0 Fully Automatic 4.3 amp Battery Charger and Maintainer 12V

This battery charger/maintainer works excellently with almost no effort to recharge a weak battery or maintain a battery in cars that aren't driven regularly. This is especially important in colder weather as the charge can drop enough to be unable to start the vehicle. This almost happened to my 2011 BMW 535i Xdrive 95Ah battery after not moving it for 2 weeks mid winter. I got several low charge warnings but thought they would go away once I drove a bit, but trips were far and few between.The charger power cord is hard wired, and the output leads have a fast clip connector at the far end to plug in either the alligator clip ends or 1/4" eyelets for a more permanent connection to make frequent charging easier.Both the power cord and the output leads are 6' long for a total of 12' plus another 18 inches for either the alligator clip or eyelet connectors, so there's plenty of length to position the charger where you want. The clips are spark free and have polarity protection so you don't have to worry about those when making your connection.Plugging the device in starts it in standard vehicle battery mode. Other modes include motorcycle for smaller vehicles, AGM for those batteries, and a reconditioning mode to restore full capacity to batteries that have lost some charge capability.From almost dead, it took about 28 hours to go through all 7 phases of charge. Patience is the way to go here, don't check often, especially if you have to open a door or hood to do so.I found it best to leave it under the hood with it slightly ajar and check every 4 hours or so. Resist the urge to unplug it because you think it's not progressing. It is. Even in cold weather it will get your battery back in great condition with little more than the press of one button. Highly recommended.

We all use many tools and utilities and appliances and devices in our everyday lives. Many of these things work well, and some frustrate the heck out of us. This little device is a true gem. In my book, it ranks among the absolute best devices in terms of its usefulness and utility and also its quality of construction. It is easy to operate, and the instructions manual is well-organized and very clear.I have used it to recondition (not just charge, but recondition) my various car batteries many, many times. The reconditioning feature really and truly works. It brings batteries back from the dead and makes them work like brand new batteries. It has paid for itself fifty times over for me. I highly, highly recommend it.

CTEK MXS 5.0 Battery ChargerSmart, safe, and reliable.Fully automatic 8-step charging.Revives dead batteries and maintains them long-term.Perfect for cars, bikes, and seasonal storage.

This is a fantastic battery charger that has worked perfectly for me and my C6 Corvette for the past 6 months. In particular, for any Corvette owners reading this, like me, you are concerned about your ride's battery draining. That pesky parasitic drain is something we just have to deal with on these cars, and this charger takes care of that and more! Not only does it maintain your battery's charge and prevent the drain, but it also optimizes the battery and reconditions it, helping to improve lifespan and performance. This CTEK model in particular is pretty much the exact one used by Chevy as the OEM Corvette battery charger (just branded as Corvette and costs almost double). Overall it is very easy to use & easy to read and know where it's at in the charging process with corresponding lights. There's a section in the included user manual which tells you what is occurring at each step in the process.My only slightly negative observation is a very slight "buzzing" noise coming from the charger when plugged in, but otherwise, it has worked flawlessly for me and has helped keep my battery charged up and ready for action!

Prime Day sale made the value exceptional. Charger is excellent quality, decent instructions, works perfectly. I was previously charging Sprinter van battery with my motorcycle trickle charger, which was okay, but not ideal. This charger made a big difference in charging time and end result was a higher final voltage. Can plug in and forget as it works great as a maintenance charger. I had to add-on the silicon bumper/protector and extension cable for the battery clips - so final cost is higher if you need those options. Only complaint is proprietary plugs which means I can't use the cables from my existing charger. CTek makes a charger with Mercedes-Benz branding - this is the same charger but without the lithium battery capability and M-B branding, so almost half the price (on sale). Highly recommended.

The item is and seems to work as described. Only recently received and started using the item so can't comment too much in detail about how well it works. While the instructions for set up and use are relatively simple and easy to understand, perhaps there could be more information about how the unit worlks.For example, what will happen when the battery is fully charged. It seems the charging lights will remain on, but the unit will not continue charging the battery and will resume charging only if the battery starts losing its charge.Maybe the unit could have a light or indicator when it is in the maintenance mode.