CTEK - 40-206 MXS 5.0 Fully Automatic 4.3 amp Battery Charger and Maintainer 12V
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FREE 30-day refund/replacement
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Availability:
In Stock.
Arrives
Nov 6 – Nov 8
Features
- Battery Charger: MXS 5.0 is a fully automatic 8-step battery maintainer that provides an outstanding charging experience for 12-volt lead acid and AGM batteries , Ideal for car and bike owners.
- Improved Charging: MXS 5.0 is designed to optimally charge in all conditions. Whether it's marine, car, bike, RV or tractor it's the perfect companion - especially for cold weather drivers!
- Maximize Lifetime and Capacity: The 4.3 amp battery charger's reconditioning function can improve the lifespan of healthy batteries*, and bring some underperforming batteries back to life.
- Splash and Dustproof: MXS 5.0 battery charger is splash, dust, spark and shock proof, making it a reliable and safe option with a short-circuit-proof design that prevents reverse polarity
- Set and Forget: CTEKs patented float/pulse charging allows set and forget for months at a time without harming the battery. No need to disconnect the battery during use its simply plug and play.
- Compact and Portable: Despite its powerful performance, the MXS 5.0 remains compact.
- *Recondition your battery once per year and after deep discharge to maximize lifetime and capacity.
Brand: CTEK
Color: Multicolor
Product Dimensions: 5.91"D x 11.02"W x 2.36"H
Item Weight: 1.3 Pounds
Output Voltage: 12 Volts
Manufacturer: CTEK
Brand: CTEK
Model: MXS 5.0 BATTERY CHARGER
Item Weight: 1.3 pounds
Product Dimensions: 11.02 x 5.91 x 2.36 inches
Item model number: 40-206
Is Discontinued By Manufacturer: No
Exterior: Painted
Manufacturer Part Number: 40-206
OEM Part Number: 40-206
Voltage: 12 Volts
Date First Available: May 14, 2013
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 6 – Nov 8
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Financing through Apple Pay
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Top Amazon Reviews
Jay Leno talked about this unit on his show and praised it highly, he's a real car guy plus I highly doubt Jay's endorsement could be bought. I plugged mine onto what had been a healthy 12V car battery that tested at only 11.6 volts when resting. Overnight, the charger went through all 8 steps of charge/test and had a green light. Now the battery tests at 12.6v Maybe any other charger would have restored it that well but this thing puts the battery through a lot of steps to improve and insure it's 'health'. Highly recommend. High quality, fast charge, great power, easy to attach, LONG cord, easy to use basically plug'n'play. The instruction manual however, not so great. I viewed some youtubes to make sure I understood the various functions, there are plenty of them, turns out this is a very popular charger for real car guys.
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Reviewed in the United States on October 30, 2025 by TDW TDW
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.
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Reviewed in the United States on January 26, 2025 by JetsetterJason
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.
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Reviewed in the United States on December 9, 2024 by F. Ross
CTEK MXS 5.0 Battery Charger Smart, safe, and reliable. Fully automatic 8-step charging. Revives dead batteries and maintains them long-term. Perfect for cars, bikes, and seasonal storage.
Reviewed in the United States on September 4, 2025 by Alex
I've used a CTEK to maintain the battery in the Vette since 2017. Wanted another, same model, but apparently that has been replaced with this unit. Well, it works great. Just bought a new AGM battery and even though it came out of the box at 12.83 VDC, I used this new CTEK to see if it might "energize" it. It did, After several hours, the new CTEK went through its routine and actually brought the new battery to 13.15 VDC. It's been 3 days since I removed the CTEK and as of today, the new AGM battery is at 13.10 VDC. Good quality, works great. If you have a questionable battery, try one of these. You might revive what you think is a battery that needs to be replaced. Sure, it takes time but that's how the process works. 5 stars all day long and cheaper than a new battery!
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Reviewed in the United States on September 28, 2025 by R G TURNER
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.
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Reviewed in the United States on May 4, 2025 by Sunshine Genie
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.
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Reviewed in the United States on May 13, 2025 by James Y.