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The is no better charging solution for the money.  This is worlds smartest battery charger - standard equipment on Bentley and Ferrari.

The 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 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

Spec Data
Part No. 56-864
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

The CTEK is very versatile. It can be mounting inside the engine compartment and left there for permanent use, plugging it in when parked for maintenance charging. You can also mount it to a lift or bench and charge any vehicle as it sits and gets worked on. All CTEKs will also work on tractor and lawn equipment, motorcycles etc. Excellent value, ditch the old-school heavy charging boxes.

Base Purchase Price: $79.95
OUR Price: $69.95


Customer Feedback:
I own two of these excellent chargers – they are very simple to operate and very durable.
The chargers are weatherproof, and you can permanently mount them in the engine compartment with the provided ring terminals, or just use the alligator clips.
- Richard J. Misner
This is the best charger ever. I have a lead plugged into my motorcycle, and 2 cars and
I rotate it between the 3 of them and they start up like th battery is brand new. This will pay for itself just in not having to buy a new battery. Don’t think you’ll find something similar at wal mart for half the price. Don’t go cheap as this is the best and well worth it.
- Slippery Pete

Other Info
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