CTEK - 40-206 MXS 5.0 Fully Automatic 4.3 amp Battery Charger and Maintainer 12V
Condition: New
Buy Now, Pay Later
As low as
$19.00
/ mo
Learn more
- – 6-month term
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Saturday, Feb 14
![HiSport 89017372 Fuel Injector Metal Retainer Clips Insulator Retainer Kit [8pcs]](https://m.media-amazon.com/images/I/61jjnzZbBwL._AC_US500_.jpg)
Size: MXS 5.0
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.
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
Product Dimensions: 11.02 x 5.91 x 2.36 inches
Item Weight: 1.3 pounds
Item model number: 40-206
Is Discontinued By Manufacturer: No
Date First Available: May 14, 2013
Department: Unisex-Adult
Manufacturer: CTEK
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Feb 14
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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Size: MXS 5.0
I have two of these chargers. One that I have been using for 4 years and the other for 1 year. They work great and are in almost constant use for keeping a tractor, a mower and a motorcycle charged and the batteries maintained. They are not cheap but I believe that they are worth the price given how well they work, how long they last, and how they extend battery life.
...
show more
Reviewed in the United States on January 25, 2026 by ATCZERO
Size: MXS 5.0
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.
...
show more
Reviewed in the United States on October 30, 2025 by TDW TDW
Size: MXS 5.0
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.
...
show more
Reviewed in the United States on January 26, 2025 by JetsetterJason
Size: MXS 5.0
Love the CTEK chargers and have not had one problem with them or any car they have been on. Will charge any battery has a low rate of charge so will not damage electronics in cars and a fraction of cost of OEM chargers. Weight is irrelevant but it comes with a carry bag.
Reviewed in the United States on December 28, 2025 by R
Size: MXS 5.0
Been using this in my 2021 BMW 228 while it is stored for winter. It is user friendly and easy to use. I can unhook it and start up no problem and it is maintaining the battery well. No complaints and much more affordable than the BMW branded battery packs which I hear are made by the same company
Reviewed in the United States on December 30, 2025 by Rylee
Size: MXS 5.0
Performs exactly as it should, UI is clean and intuitive. Solidly made, power cord is heavy duty. Costs 40% more than NOCO 5, but comes with a 5 year warranty (versus NOCO 3 year). Only 1 negative - the clamp cable wires are too short, for long, classic european 95ah AGM batteries (like classic Ferrari, Mercedes or BMW) without charge system management connectors (so you attach directly to battery terminals), they can barely stretch across to both terminals. Had to use the (included) eyelet permanent connector cable. But that solved it. That’s the only reason for not giving a 5 star review.
...
show more
Reviewed in the United States on December 4, 2025 by Aren.