CTEK MXS5.0 Charger Next Generation 12V Battery Charger 40-206 MUS4.3

Latest model purchased in 2024 (sale item) Sale item with scratches on the exterior package is on final sale! Only a few. [1 year warranty included]
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Delivery time is estimated to be 2-3 weeks once inventory is sold out.

CTEK's latest charger!! Japanese manual and 1 year warranty included.
Introducing the latest charger from CTEK, which is famous as the smartest charger ever and a charger with a brain.
CTEK is a high-performance, high-performance battery charger that has sold over 2.5 million units worldwide.
Ferrari, Porsche, Aston Martin, Bentley, Harley-Davidson, Mercedes, Maserati, Lamborghini, Lexus, Yamaha, etc.
The same product is supplied on an OEM basis and is recommended for use as a battery charging and maintenance tool.

Advanced microprocessor-controlled battery charger provides ultimate charging and maintenance capabilities. While in charging mode, this unit provides excellent performance with batteries from 1.2Ah to 110Ah. It solves a wide range of battery problems and features, including a patented automatic desulfation program. The charger has a special regeneration function that revives and restores discharged multi-layer batteries.

Patented float/pulse maintenance makes it ideal for long-term maintenance. RECOND mode and SNOWFLAKE mode work individually or simultaneously with both 0.8A and 4.3A programs, providing great flexibility to users. Test mode has three easy-to-use programs to test battery voltage, starting power, and alternator performance, giving you a complete picture of the health of your battery and vehicle charging system. MUS 4.3 Testing & Charging is easy and safe to use, protects vehicle electronics, spark free, reverse polarity protection and short circuit prevention.

This is a next-generation charger and maintainer that enables full-fledged Ctek 8-step charging for everything from motorcycle batteries to car batteries.
Another major feature is that the current charging step status can be displayed in detail with 8 LEDs. Not only has charging accuracy been greatly improved with 8-step charging compared to the 4-step charging of the conventional US3300, it also has a recondition mode (15.8V/1.5A) to revitalize damaged batteries.

Part No. 40-206
Input voltage 100VAC
Charge voltage 14.4 / 14.7 / 15.8V
Charge current Max 4.3A
Type of charger 8 step, fully automatic charging cycle, 3 voltage test programs
Type of battery 12V lead-acid batteries (Wet, MF, AGM, GEL)
Battery Capacity 1.2-110 Ah, up to 160 Ah for maintenance
Insulation IP65 (splash and dust proof)

Maximizing vehicle battery performance Sweden's CTEK AB invented the latest smart car chargers for consumers almost 20 years ago. CTEK chargers use unique patented technology to ensure batteries are easily and safely charged and optimally maintained. CTEK chargers can also monitor battery health and take appropriate actions to maximize battery capacity and lifespan.

Battery-related issues are the number one reason for US auto breakdown assistance callouts. Regular use of a CTEK charger will keep your battery in optimal condition and save you the cost, inconvenience, and frustration of unexpected battery failure. For less than the cost of a new battery, CTEK battery chargers are a worthwhile investment for cars, trucks, boats, motorcycles, ATVs, lawn and garden equipment, and more. Learn more about CTEK battery management products on the official website.


Reliable in any conditions, the Swedish-designed CTEK smart charger is extremely rugged and can withstand the elements. Most chargers have an operating temperature range of +122 degrees Fahrenheit and stay best between -4 degrees Fahrenheit and 1 degree Fahrenheit. There are also CTEK "Polar" chargers with features such as special cables that work in very cold conditions and unique charging parameters.

CTEK battery chargers are shockproof, weatherproof, dustproof and fully approved for year-round outdoor use (IP44-IP65). So no matter where you park your car, your CTEK battery charger will always be ready for use.

extend battery life
Regular use of a CTEK battery charger has been proven to extend your vehicle's battery life by up to 3x.

Vehicle batteries are charged and maintained in optimal condition through a series of charging stages (4, 6, 8 steps, depending on unit) to improve battery performance and extend battery life.

CTEK battery chargers can desulfate, charge, recondition and maintain all types of vehicle batteries including wet/flooded, calcium, gel, lithium (with CTEK lithium chargers), and the latest Start-Stop AGM and EFB technologies. Masu. A patented float and pulsate maintenance strategy allows the battery, once fully charged, to be safely maintained at maximum capacity by the charger indefinitely, maximizing battery life.

Many CTEK battery chargers have a RECOND function. This feature, combined with the desulfurization feature, can restore the capacity of many batteries that would otherwise not be able to accept a charge. It can also revitalize severely discharged batteries.


Reliable OS supplier
CTEK manufactures battery chargers for the world's premium automakers including Audi, Bentley, BMW, Corvette, Ferrari, Jaguar, Koenigsegg, Lamborghini, Maserati, McLaren, Mercedes, Porsche, and Rolls-Royce. These well-known and selective OE customers trust the superior quality, value and technical performance of CTEK chargers and sell them under their own brand.


Low ripple advantage
CTEK's battery chargers and maintainers produce extremely clean voltages and currents that are safe for the battery and vehicle electronics, regardless of how long the charger is plugged in.

Current ripple in excess of 5%, which is common in less advanced battery chargers, will cause aging of the positive battery electrode, while high voltage ripple can harm sensitive and expensive vehicle electronics. . Why does using a "CTEK imitation" charger pose a risk?


Safe for vehicle and user
The CTEK battery charger's advanced electronics ensure that it is extremely safe to use. The charger features, for example, spark and reverse polarity protection. If you accidentally reverse or touch the clamp, the charger will detect the error, stop working, and display an error light to indicate the fault. Safety features on all CTEK chargers are developed to protect you, your battery, and your vehicle.