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4.3 A

CTEK MUS 4.3              

CTEK MUS 4.3

CTEK COMFORT CONNECT–clamp

CTEK COMFORT CONNECT

–eyelet ¼” (M6)

• 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

CONNECT AND FORGET

MODE

RECOND

12V/0.8‒4.3A

MUS 4.3

1

1

2

3

1. Connect the charger to the battery.

2.   Connect the charger to the wall socket.  

Power-on lamp lights

3. Press the MODE-button to select charging program.

Small sized batteries

Medium sized batteries

Charging in cold conditions and AGM batteries requiring 

14.7 V charging
Reconditioning of deeply discharged batteries

4. … and ready.

1

 STEP 1 

DESULPHATION

Pulsing voltage removes sulphates from the lead plates of the battery 

restoring the battery capacity.

2

 STEP 2 

SOFT START

Tests if the battery can accept charge. Charging begins if the battery 

is OK.

3

 STEP 3 

BULK

Charging with maximum current until approximately 80 % battery capacity.

4

 STEP 4 

ABSORPTION, 

READY TO USE 

Charging with declining current to maximize up to 100 % battery 

capacity. 

5

 STEP 5

 ANALYSE

Tests if the battery can hold charge. Batteries that cannot hold charge 

may need to be replaced.

 

6

 STEP 6 

RECOND

Reconditioning function for deeply discharged batteries.

7

 STEP 7 

FLOAT, 

FULLY CHARGED

Maintaining the battery voltage at maximum level by providing a 

constant voltage charge.

8

 STEP 8 

PULSE, 

MAINTENANCE CHARGING 

Maintaining the battery at 95–100 % capacity. The charger monitors 

the battery voltage and gives a pulse when necessary to keep the 

battery fully charged. 

GUARANTEED QUALITY WITH CTEK

CTEK customer support is available to answer any questions related to 

charging and CTEK chargers. Safety, simplicity and flexibility character-

izes all products and solutions developed and sold by CTEK. CTEK sup-

ply chargers to more than 60 countries throughout the world. CTEK is also 

a reliable OEM supplier to many of the world’s most prestigious car and 

motorcycle manufacturers. 

Contact customer support: [email protected]

CTEK POWER, INC. 

2374 EDISON BLVD. TWINSBURG, OH 44087-2376, UNITED STATES

20017507A US

CTEK’s UNIQUE 8 STEP CHARGING

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