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- Made in USA or Imported
- Fully automatic charging and maintenance in 8 steps maximizes battery life and performance
- Water and dust resistant means it is safe to use in all climate situations
- No sparks, short-circuit proof and reverse polarity protected makes it safe for all the vehicles electronics and easy to use
- Patented maintenance charge for a unique combination of maximized life and performance
- Numerous accessories simplifies using the same charger for multiple battery applications
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From the manufacturer
CTEK Fully Automatic Charging
Maximizes Battery Performance In Vehicles
Swedish CTEK AB invented the modern automotive smart charger for consumer use almost 20 years ago. CTEK chargers use unique and patented technology to ensure batteries are easily and safely charged and optimally maintained. CTEK chargers also monitor the battery’s health, enabling the unit to take appropriate action to maximize battery capacity and lifespan.
Battery-related problems are the number one reason for car breakdown assistance call-outs in the US. Regular use of a CTEK charger will ensure your battery is kept in optimal condition, guarding against the cost, inconvenience and frustration of an unexpected battery failure. For less than the price of a new battery, a CTEK battery charger is a worthwhile investment for cars, trucks, boats, motorcycles, ATVs, lawn and garden equipment and much more. Find out more about CTEK battery management products at our official site.
Reliable In Any Conditions
Swedish-engineered CTEK smart chargers are extremely rugged and able to endure extreme weather conditions. Most chargers have an operating temperature range of -4 degree Fahrenheit to +122 degree Fahrenheit, allowing them to keep your vehicle’s battery in prime condition throughout the year. There is also a CTEK 'Polar' charger with features such as special cables and unique charging parameters to operate in the very coldest conditions.
CTEK battery chargers are also shockproof, weatherproof, dustproof and fully approved for year-round outdoor use (IP44-IP65). So, no matter where you park or store your vehicle, your CTEK battery charger will help ensure it is always ready to go.
Extends Battery Life
Regular use of a CTEK battery charger has been proven to extend your vehicle's battery life by up to three times.
Vehicle batteries are charged and maintained in optimal condition through a series of charging stages (4, 6 or 8-steps, depending on the unit) – designed to improve battery performance and extend battery life.
CTEK battery chargers can desulphate, charge, recondition and maintain all types of vehicle batteries, including wet/flooded, calcium, gel, lithium (using CTEK lithium chargers), the latest Start-Stop AGM and EFB technology. A patented float and pulse maintenance strategy ensure that once fully charged, the battery is safely maintained at maximum capacity indefinitely by the charger, which is crucial to maximize battery lifespan.
Many CTEK battery chargers have a RECOND function. This function, in combination with the desulphation function, is able to restore capacity in many batteries that are otherwise unable to accept a charge. It can also rejuvenate batteries that have been severely discharged.
Trusted Oe Supplier
CTEK manufactures battery chargers for the majority of premium automotive manufacturers in the world, including Audi, Bentley, BMW, Corvette, Ferrari, Jaguar, Koenigsegg, Lamborghini, Maserati, McLaren, Mercedes, Porsche and Rolls-Royce, among others. These prominent and selective OE customers trust the superior quality, value and technical performance of CTEK chargers so much they sell them under their own brand.
Low Ripple Advantage
CTEK battery chargers and maintainers produce very clean voltage and current that is safe for batteries and vehicle electronics, regardless how long the charger is left connected.
A ripple in the electrical current of more than 5%, which is common in less advanced battery chargers, has an aging effect on the positive battery electrode, while high-voltage ripple can harm sensitive and expensive vehicle electronics. Why risk problems using a 'CTEK imitation' charger?
Safe For Vehicle and User
The advanced electronics in a CTEK battery charger ensure it is very safe to use. The chargers feature spark and reverse polarity protection, for example. If somebody accidentally reverses the clamps or touches them together, the charger will detect the error, discontinue operation and show an error light to indicate the fault. The safety features in all CTEK chargers have been developed to protect the user, the battery and the vehicle.
Warranty info online from Manufacture.
Top customer reviews
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After 3 years of using this here is my update.
My 4 year old BMW battery "died" in 2014. This baby brought it back to life and I got another 3 years out of it before it finally gave way. That's 7 years!! I'm pressed. Money back many times over. It did a fabulous job with the recondition program. This time I'm going to use once a year as recommended by the manual and not wait for the battery to die before using it and I'm sure I'll get more than 7 years from new battery. Will keep you posted.
Meanwhile I've used it to recharge my portable jump starter and it is running on it's 6th year.
I've used it as a battery tender when I don't use my car for weeks/months sometime (I don't drive my car much and it's notorious for battery drain).
Overall I'm thoroughly impressed with this baby and brought a few for family as Christmas gifts :)
Upgrade to 5 stars.
Original Review: 4 Stars
I have a BMW 535i, the car had been lying for about a month in the garage. The battery was about 3 years old (original) and when I tried to start the car after the month I got a deep discharge warning with no start. BWM informed me that the CCA was down to 8 (original was 900) and the battery needed to be replaced (cost a pretty penny to install and program a new battery).
My primary concern with a battery charger and trickle chargers was from what I've researched is that the BMW battery charging system was VERY sensitive to high voltages (which some charges do).
After lots of research I decided to try using the CTEK MUS 4.3 primarily for 2 reasons, 1. It had a battery recondition mode, 2. It had great trickle charging reviews.
First up was reconditioning my BMW battery, since reconditioning exposes the battery to high voltages for desulphating, I decided to disconnect the battery from the car electronics in the boot and directly connect the CTEK to the battery. Left it for 2 days (it's slow but that' fine, I'm no rush). It been 6 months now since I've done it and NEVER had a problem with the discharge and battery warnings from the car. Going strong so far, I even noticed the car start smoother (with fewer turns) like the battery is giving more juice to the engine.
Now I've realized that BMW's are HUGE battery guzzlers even when parked, I always put the battery on trickle charge when not using the car for more than a week (directly through the engine terminals, without removing the battery). I've left it on charge for upto a month and it's been PERFECT! No side effects and the battery's doing great.
To avoid the spark some people face, first up, the spark comes from the wall outlet and NOT the clamps. I just plug in the CTEK unit to the wall socket first and then clamp the battery terminals (positive first). No more sparks.
Make sure you select the right mode, car, motorcycle, cold/AGM or recondition (and never use recondition on a battery that's plugged into the car electronics, disconnect the battery from the car and then plug it into the CTEK directly, the battery can lie in the car, but disconnect the car terminals).
Great 60 bucks.
So to summarize:
- Works great on BMW's and Chevy's
- Very reliable (even through power cuts, picks up from where it left off once the power returns)
- Supports AGM batteries and regular batteries
- Reconditions old/dead batteries (+++ - this was my winner)
- Good warranty
- Clamps could be a little better (stronger with alligator clips)
- Could have a longer clamp wire (just about for me, but cars with terminals far apart may have an issue)
- A little slow (but that doesn't matter since I'm looking at reconditioning and long term trickle charges)
I've since discovered and purchased the BatteryMinder 128CEC1, and it is close to my ideal smart charger, as it combines a full-time desulfation with multiple voltage profiles for gel, flooded, and high-performance AGM specific batteries, almost combining all of the functionality of the Ctek and XtremeCharge. The one thing it misses is the recondition charge function of the Ctek. It does add an 8 amp charge capability and temperature compensation. It will also attempt to recover batteries from low voltages that would usually require a "dumb" charger to start with a Ctek or Xtreme Charge. If I were to only have one charger, the 128CEC1 would be my choice. It does come at a price though, as you could almost buy a Ctek and an Xtreme Charge for the same price. You'd be missing the temperature compensation though, which I feel is important if you are charging batteries in less than ideal temperature conditions..
I have an old Schumacher battery maintainer, a Yuasa SmartStart 1.5, a Pulsetech Xtreme, and the CTEK MUS 4.3.
The Schumacher is just a maintainer/charger. It has no desulphate mode, but works well to keep the battery topped up.
The Yuasa does the same thing, but adds a mediocre desulphate mode. In testing, I found that it did bring batteries to a higher state of charge then the Schumacher.
The Xtreme Charge is a powerful tool for desulphating batteries, but it does not do as well as the MUS 4.3 at fully charging a good battery.
The MUS 4.3 has a desulphate mode, but I've never seen it enter that mode, even on a badly abused battery.
I'm currently in the process of attempting to restore a 12V 22 Anp-hour 5 year old AGM battery that was deeply discharged, to under 6v. The Schumacher, Yuasa, and Xtreme all refused to even start on this battery. I had given up on it, and was about to order a replacement, when I decided to try out the MUS 4.3.
When I plugged in the MUS 4.3, it attempted to charge the battery, but then found the battery bad after it dropped to under 12v in 3 minutes, after it attempted to charge the battery. I feel that afew attempts to recharge the battery would probably have done the trick, but it was bed-time, so I figured I'd go back to ol-reliable Xtreme Charge.
I then hooked up the Xtreme Charge, and it began to charge the battery. After letting it sit overnight on the battery, the battery was able to hold over 12V. I decided to leave it on the Xtreme charge another 12 hours, and will attempt a recondition with the CTEK.
I will update later on my progress, but my conclusion so far, is that the CTEK offers features the Xtreme Charge does not have, while the Xtreme Charge offers features the CTEK does not have. Both are top of class chargers. I wish I could somehow combine them into one. If the CTEK would always desulphate, like the Xtreme charge does, I'd pick it over the Xtreme. As is, I'd lean more toward the Xtreme. For cases where it does not want to start charging to to low voltage, one can use a $10 trickle charger to bring the battery up over 11 volts. My trickle charger died though, and I have yet to replace it.
After leaving the battery that the CTEK said was bad, on the XTreme charge for a week, it now is working well. The Xtreme Charge would not charge the battery before I tried the CTEK on it though.
At this point, if I had to have one battery maintainer, I'd stick with an Xtreme Charge and get a $10 trickle charger for truly dead batteries, to get them up to where the Xtreme Charge will charge them.
That said, I'm happy to have the CTEK, in addition to the Xtreme Charge as the different modes the CTEK has can come in handy.
I have a car with a year old battery that stopped accepting a charge. This car sits a lot, but is kept on one of my battery maintainers when it is sitting for long periods.
After several months of driving it every day, it stopped accepting a full charge. It got to the point where I was keeping it on the Xtreme charge at night, but it still would barely start the car at the end of the day. I checked the alternator and it was fine. I was almost ready to buy a new battery when I decided to give the CTEK a try.
I set the CTEK to recondition mode, and it spent several hours charging the battery. The next morning, the engine fired up with gusto. That evening, after sitting at work all day, it fired up with gusto again, and the next morning and evening as well.
The CTEK just paid for itself once more. At this point, I feel like both chargers, the CTEK, and the Xtreme, definitely have there own niches. I am glad I have both.
I wound up leaving the lights on for my Suzuki Samurai, which has a 4 year old battery. I did not drive it for two months, so the battery was stone dead for that time.
Neither the XtremeCharge nor the CTEK will charge a completely dead battery, so I hit it with my old Schumacher first. The Schumacher instantly showed the battery fully charged, indicating that the battery had no capacity.
After that, I tried the Xtreme Charge, but it said the battery was bad. I put the CTEK on the battery in recondition mode, and left it on for 12 hours. After that, the battery started the Samurai, but very slowly, indicating the battery still did not have much cranking capacity.
Next I put it on the Xtreme Charge for 12 hours, and it never went above 75% charge, but the the engine fired up like new again.
I did one more recondition with the CTEK, but have not had time to do another application with the Xtreme Charge so I don't know if it will take a 100% charge. I will update when I do get a chance, but I am very happy as of now since I did not have to buy a new battery.