CTEK 12V Battery Charger - MUS 4.3 Polar

CTEK MUS 4.3 Polar 12V Battery Charger – Reliable Cold Weather Performance

Shop the CTEK MUS 4.3 Polar 12V Battery Charger for top-tier performance in extreme cold. Designed for cars, motorcycles & more, it ensures safe, efficient charging in harsh winter conditions.

The CTEK MUS 4.3 Polar 12V Battery Charger is a premium smart charger designed for reliable performance in extremely cold climates. Engineered with advanced technology, it optimally charges and maintains all types of 12V lead-acid batteries, including AGM, Gel, and EFB. Featuring a unique cold weather mode and arctic-grade cables, this charger ensures efficient power delivery even in sub-zero temperatures. The fully automatic 8-step charging process extends battery life while preventing overcharging or undercharging. Ideal for cars, motorcycles, ATVs, snowmobiles, and more.

Best Uses:

✅ Charging and maintaining 12V batteries in extreme cold
✅ Ideal for vehicles like cars, motorcycles, snowmobiles, ATVs & boats
✅ Works with AGM, Gel, EFB & lead-acid batteries
✅ Great for winter storage battery maintenance
✅ Perfect for outdoor use with all-weather protection

Top Features:

1. Cold Weather Mode – Optimized charging in freezing temperatures
2. Arctic-Grade Cables – Designed for extreme winter conditions
3. Spark-Proof & Reverse Polarity Protection – Safe & easy to use
4. Compact & Lightweight Design – Portable and convenient for on-the-go charging
5. 8-Step Charging Process: Fully automatic charging cycle that diagnoses, recovers, charges, and maintains your battery.   
   
   
6. Polar Functionality: Designed to operate reliably in cold temperatures, making it perfect for winter battery maintenance.   
   
   
7. Maintenance Charging: Automatically switches to maintenance charging mode once the battery is full, preventing overcharging and maximizing battery life.
8. Desulphation Function: Helps recover and rejuvenate sulphated batteries, extending their lifespan.   
   
   
9. Splash and Dust-Proof (IP65): Durable and weatherproof design for safe use in various environments.

Top Benefits:

• Prolonged Battery Life: The intelligent charging process optimizes battery health and extends its lifespan.  
  
  
• Improved Battery Performance: Ensures your battery is always fully charged and ready to perform.   
  
  
• Safe and Easy to Use: Simple and intuitive operation with clear LED indicators.   
  
  
• Versatile Compatibility: Suitable for a wide range of 12V lead-acid batteries.   
  
  
• Peace of Mind:  Provides confidence that your batteries are always in optimal condition.  
• Reliable Cold Climate Charging – Works flawlessly in temperatures as low as -30°C
• Extends Battery Life – Maintains optimal performance and prevents sulfation
• All-Weather Durability – Resistant to moisture, dust, and extreme conditions

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The CTEK Charger, MUS 4.3 (Part No. 56-864) is a charger that offers state of the art technology that was previously only found in CTEK’s professional product range. The charger can solve a broad range of battery-related problems and is the perfect charger for those with high demands. The MUS 4.3 offers features such as battery diagnosis that shows if a battery can receive and retain a charge, a special reconditioning function that restores stratified and deeply discharged batteries, unique maintenance charging, a mode for optimized charging during cold winter days and the charging of demanding AGM batteries (i.e. Optima). The unique display allows the user to follow the entire charging process. The CTEK Charger, MUS 4.3 is a fully automatic 8-step charger that delivers selectable 0.8 A or 4.3 A to 12 V batteries from 1.2–110 Ah and is suitable for maintenance charging up to 160 Ah. The charger is splash and dust proof, designed to protect vehicle electronics and non-sparking, reverse polarity protected and short-circuit proof. It is delivered with a 5-year warranty. 

• Fully automatic charging and maintenance in 8 steps maximizes battery life and performance 
• Numerous accessories simplifies using the same charger for multiple batteries 
• One charger for the car, motorcycle, lawn mower, snowmobile, sump pump and tractor 
• Water-resistant so that the solution could be taken to the problem even if it rains or snows 
• Patented maintenance charge for a unique combination of maximized life and performance 
• Recondition of deep discharged batteries 
• Patented desulphation that extends the battery life 
• No sparks, short-circuit proof and reverse-polarity protected for untroubled usage 
• Automatic detection of end-of-life batteries that eliminates surprises 
  

Technical Data

• Charging voltage: 14.4 / 14.7 / 15.8 V
• Charging current: Max 4.3 A
• Type of charger: 8 step, fully automatic charging cycle
• Type of battery: 12V lead-acid batteries
• Battery capacity: 1.2 - 110 Ah, up to 160 Ah for maintenance