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CTEK (56-958) MUS 4.3 POLAR 12 Volt Fully Automatic Extreme Climate 8 Step Battery Charger
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | CTEK |
Color | Orange |
Product Dimensions | 6"D x 11"W x 2.5"H |
Item Weight | 1.94 Pounds |
Input Voltage | 12 Volts |
About this item
- Specially developed for use in extreme cold conditions featuring AC and DC cables adapted to handle severe cold temperatures
- Fully automatic 8 step patented program tests battery condition and revives, charges and maintains to ensure maximum battery life and performance
- No sparks, short-circuit proof and reverse polarity protected makes it safe for all the vehicles electronics and easy to use
- Water and dust resistant means it is safe to use in all climate situations
- Numerous accessories simplifies using the same charger for multiple battery applications
Frequently bought together
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This Item CTEK (56-958) MUS 4.3 POLAR 12 Volt Fully Automatic Extreme Climate 8 Step Battery Charger | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | -21% $109.99$109.99 List: $139.45 | $116.98$116.98 | $29.55$29.55 | -20% $99.95$99.95 List: $124.95 | -22% $69.95$69.95 List: $89.95 | -23% $49.94$49.94 List: $64.95 |
Delivery | Get it as soon as Monday, Mar 25 | Get it as soon as Friday, Mar 22 | — | Get it as soon as Monday, Mar 25 | Get it as soon as Monday, Mar 25 | Get it as soon as Monday, Mar 25 |
Customer Ratings | ||||||
Easy to use | 4.8 | 5.0 | — | 4.4 | 4.6 | 4.6 |
Value for money | 4.5 | 5.0 | — | 4.3 | 4.4 | 4.3 |
Safety Features | 4.7 | 5.0 | — | 4.4 | — | — |
Longevity | 4.5 | — | — | 4.1 | 4.1 | — |
Sold By | R/A Hoerr Incorporated | R/A Hoerr Incorporated | Blue Grass Wholesale | Amazon.com | Amazon.com | Amazon.com |
input voltage | 12 volts | 5 volts | 240 volts | 120 volts | 120 volts | 120 volts |
battery charge time | — | — | — | 10 hours | 10 hours | 10 hours |
specification met | — | reach | CE | UL, CEC, FCC | UL, CEC, FCC | — |
weight | 1.94 pounds | — | — | 3.99 pounds | 1.59 pounds | 1.23 pounds |
From the manufacturer
Extreme temperature charging
Extreme temperature charging
CTEK’s MUS 4.3 POLAR battery charger and maintainer has been specially developed for use in extreme cold conditions. It features Nordic standard cables adapted for use in low temperatures and orange casing for high visibility. It’s the ideal charger for cold weather vehicles such as snowmobiles and it will charge over a wide range of temperatures right down to -22°F (-30°C). The MUS 4.3 POLAR uses CTEK’s unique, patented system to recover, charge and maintain all types of lead-acid battery to maximize performance and extend battery life.
Safe and simple for winter performance
‘Snowflake’ and Reconditioning Modes
The MUS 4.3 POLAR’s special ‘Snowflake’ mode gives you a faster charge in extreme cold temperatures, as well as charging AGM batteries. The dedicated ‘RECOND’ reconditioning program restores battery life and reconditions dead batteries.
Patented Desulphation Function
Unused batteries lose their power and their life can be shortened through sulphation. The MUS 4.3 POLAR analyzes the state of the battery and, if possible, recovers the battery and its health.
Safe Operation
The MUS 4.3 POLAR has non sparking, reverse polarity protected clamps. It’s short circuit proof with clean voltage and current delivery to ensure there are no surges or spikes.
- ‘Snowflake’ mode for extreme conditions down to -22°F (-30°C)
- ‘RECOND’ mode to restore stratified and deeply discharged batteries
- Patented desulphation function
- Splash proof, dustproof and short circuit proof
- Nordic standard cables with non-sparking, reverse polarity protected clamps
- Simple plug and play operation – select the program and mode and leave the charger to do the rest
- Fully automatic 8-step charging
- Works with all 12V lead-acid batteries
All round charging in cold weather
- Small and normal battery modes
- ‘Snowflake’ mode for cold weather charging and AGM batteries
- ‘RECOND’ mode to restore deeply discharged or dead batteries
Accessories Available to Take Your Chargers to the Next Level (Sold Separately)
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CTEK COMFORT CONNECT INDICATOR EYELET (56-629)Comfort Indicator Eyelet is designed for permanent installation with a direct connection to the battery. For use with CTEK chargers, it enables you to charge batteries that are in hard to reach places or where using clamps is inconvenient or impossible. Extended cable length 19.6 inches. |
CTEK BUMPER (56-915)The CTEK Bumper is a silicon rubber case to protect both the CTEK MUS 4.3 POLAR battery charger as well as your vehicle's paintwork from being damaged by hitting hard surfaces or your vehicle. |
CTEK COMFORT CONNECT EXTENSION CABLE (56-304)Give yourself more length for ease-of-charging. The CTEK Comfort Connect Extension Cable extends the reach of your CTEK MUS 4.3 POLAR battery charger with additional cable length of 8.2 ft. |
CTEK Comfort Connect Cig Plug (56-263)CTEK Comfort Connect Cig-Plug enables charging the battery through a cigarette lighter outlet. It eliminates any hassle; simply charge from within the car, works perfectly with CTEK’s battery chargers. Note: The socket in the vehicle must be live when the ignition is in the “off” position to charge your battery using this accessory. |
CTEK MUS 4.3 POLAR Technical Specifications
Input voltage AC | 100-120VAC, 50-60Hz |
Charge Voltage | 14.4 / 15.0 / 15.8 V |
Minimum battery voltage req: | 2.0V |
Charge Current | Max 4.3 A |
Type of Charger | 8 step, fully automatic charging cycle |
Type of Battery | 12V lead-acid batteries (Wet, MF, AGM, GEL) |
Battery Capacity | 1.2-110 Ah, up to 160 Ah for maintenance |
From the brand
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Maximizing Battery Performance isn’t just a slogan – it’s right at the heart of everything we do and every product we make. It means we push the boundaries of research and development to bring new battery charging technologies to the market. And we’re ahead of the competition because we constantly improve and constantly innovate. Where others have diversified, we remain focused on maximizing battery performance.
Product information
Product Dimensions | 11 x 6 x 2.5 inches |
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Item Weight | 1.94 pounds |
ASIN | B00GODCLYU |
Item model number | CTK 56-958 |
Customer Reviews |
4.7 out of 5 stars |
Best Sellers Rank | #175,110 in Automotive (See Top 100 in Automotive) #601 in Battery Chargers |
Is Discontinued By Manufacturer | No |
Date First Available | November 14, 2013 |
Department | Unisex-Adult |
Manufacturer | CTEK |
Warranty & Support
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Looking for specific info?
Product guides and documents
What's in the box
Product Description
The MUS 4.3 POLAR charger has been specifically developed to offer excellent all around charging. The special cold weather performance and adapted AC and DC cables handle severe cold down to -22 degrees F (-30 degrees C). It is an advanced microprocessor controlled battery charger providing unrivalled performance on batteries from 1.2Ah to 110Ah.
The MUS 4.3 POLAR charger is loaded with features including diagnosis of battery condition to establish if it can receive and retain a charge, patented automatic de-sulphation program and a special reconditioning function that will revive and restore deeply discharged and stratified batteries. The 'Snowflake' mode ensures ideal charging performance when in the most extreme cold conditions. The patented Float/Pulse maintenance makes the charger ideal for long-term maintenance. The entire process of battery testing, charging and maintenance is easily followed on the clear LED display.
The charger is a fully automatic (connect and forget) 12V charger with 8 charging steps. The RECOND and SNOWFLAKE modes operate individually or together in both 0.8A and 4.3A programs, providing great flexibility for the user. It offers a wide charging range on all lead-acid battery types from 1.2Ah up to 110Ah, with additional maintenance capability to 160Ah.
This charger is splash and dust proof and above all, very easy to use. It also has safety features to prevent sparks and protect against reverse polarity and short circuiting ensuring that you and your vehicles electronics are kept safe.
The MUS POLAR 4.3 battery charger has a 5 year Limited warranty
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the performance, quality and ease of use of the battery charger. For example, they mention that it works well, is reliable and easy to set up. Some appreciate the cold weather flexibility and the waterproof design. That said, opinions are mixed on the battery capacity.
AI-generated from the text of customer reviews
Customers are satisfied with the performance of the battery charger. They mention that it works well, is easy to operate, and is pleased with the function and quality of the product. Some say that the charger works well on other batteries and has no problems charging them. Some customers also mention that the cords still work great in even subzero garage temperatures.
"...I’m happy it as it’s been in use for 1 month, no issues. I look forward to many years of added battery life on the imported German car" Read more
"...It works great!" Read more
"Works great" Read more
"...And it works well....BUY WITH CONFIDENCE." Read more
Customers are satisfied with the quality of the battery charger. They mention that it is the best battery charger they have had, reliable, and outstanding. Some say that it's a smart charger and their car always starts up robustly after being on the device.
"I use for a car left at beach house. Battery is always charged enough to start with no problems even after long absence" Read more
"Quality product that is extremely rugged in adverse weather conditions. User friendly and easy to use with excellent instruction manual." Read more
"...BUT THIS IS AN OUTSTANDING charger/maintainer, requiring very little power after it automatically switches to maintenance mode...." Read more
"Best battery charger I’ve had yet and I have had quite a few. This one I feel I can trust not to overcharge my battery...." Read more
Customers find the battery charger simple, easy to set up, and straight forward. They also appreciate the excellent instruction manual.
"Really liking this product so far. Easy to set up and it tells you how your battery is doing." Read more
"...If you have the same problem, this is definitely a solution. Easy to use too." Read more
"...User friendly and easy to use with excellent instruction manual." Read more
"...them compare in size, ability to mount to chasis, and just plain easy to install as this one...." Read more
Customers like the coldness of the battery charger. For example, they say it's great in the coldest weather, has good cold weather flexibility, and is waterproof.
"...120v input cable and main charger output cables do have good cold weather flexibility...." Read more
"...Also, it is waterproof, which will be great in snow and ice.Update: Have been using this charger for a few years now...." Read more
"I like the fact that the charger is rated as being able to operate in cold temperatures...." Read more
"...Have to watch where you set the unit while in use as it can get rather hot, don’t set on anything plastic or painted...." Read more
Customers are satisfied with the appearance of the battery charger. They mention that it looks cool, the color is eye catching, and the functions make it super flexible. Some appreciate the lights that tell what it is doing at the moment.
"...Works great in even subzero garage Temps for me. Nice having the lights to tell what it is doing at the moment too. Jay Leno was right on this one." Read more
"...The color is eye catching, the functions make it super flexible. I charged two of my vehicles the first day, the batteries act better than new." Read more
"Not just looks cool also working great! If you don't drive your car very often then this is a must-have" Read more
"...It's what semi-neglected winter batteries need. The color goes with anything. Tis the high 14.7 voltagemodel - for Odyssey type AGM batteries." Read more
Customers like the cables of the battery charger. They say the cables stay flexible, and the functions make them super flexible. Some say that the cables are eye catching and stay flexible in very cold temps.
"...The cold weather model does indeed have flexible cables which stay flexible - they feel like 8mm plug wires...." Read more
"...The cables were still flexible and it ran my battery through the full cycle and is keeping it charged. Time will tell...." Read more
"...The cord for this polar version stayed nice and flexible in very cold temps...." Read more
"...The color is eye catching, the functions make it super flexible. I charged two of my vehicles the first day, the batteries act better than new." Read more
Customers like the disconnect speed of the battery charger. They mention it's quick to disconnect and reconnect, and has quick connect terminals.
"...The connection was fine and the battery is brand new from last month...." Read more
"...Comes with quick connect terminals. Recommended it my car forum." Read more
"...i really like the Quick disconnect which I have wired to the tractor." Read more
"...used to keep a car charged outside in the winter time quick to disconnect and reconnect" Read more
Customers are mixed about the battery capacity of the charger. Some mention that it maintains battery charge, extends battery life, and they can trust it not to overcharge their battery. Others say that it can be too dead for the charger to work, it stops charging before the battery is fully charged, and it turns off for no reason.
"...Since installing I’ve not had any issues with the battery." Read more
"I had another brand on my import car from Germany. It would turn off for no reason...." Read more
"...three months of very cold, snowy weather and my car battery is happy and fully charged. YIPPPEEEE...." Read more
"...As it turns out, the battery can be too dead for the charger to work. This battery was new as of August 2019...." Read more
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So I bought this unit based on research and others who rated it. I’m happy it as it’s been in use for 1 month, no issues. I look forward to many years of added battery life on the imported German car