CTEK PRO 120 is an innovative and highly efficient 120A battery charger and power supply that’s designed to meet the demands of the diagnostic workshop. With its cutting edge design, advanced technology and state of the art features, it’s the perfect solution for comprehensive battery charging, maintenance and power supply.
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Extreme Power
Battery Management


The CTEK PRO 120 restores charge and reconditions batteries using a patented multi step charging process. It’s compatible with all types of 12V battery, including normal wet/flooded, Ca/Ca and Lithium (LiFePO4), as well as AGM and EFB Stop/Start batteries.

SMART: Auto-Adaptive charging

CTEK PRO 120’s ‘Auto-Adaptive charging’ mode automatically detects the appropriate settings for the battery and applies the optimum settings for the fastest charge.


Easy setting & use

It’s designed to be user friendly with just four buttons and a clear, easy to read LCD display. The PRO 120 is also the perfect stable power supply, with 12.6-14.8V available in selectable 0.1V increments. This ensures that no damage can occur to sensitive vehicle electronics.


  • 12V/120A output
  • Variable output in power supply mode (12.6V-14.8V)
  • Compatible with all types of 12V battery, including Lithium (LiFePO4)
  • Suitable for batteries from 10Ah-3000Ah (15Ah-1200Ah LiFePO4)
  • Resonant Converter technology for fast and efficient charging
  • Easy to use with clear LCD display
  • Unique, patent applied for ‘adaptive charging’ mode automatically detects battery size
  • Built in temperature compensation
  • Rugged, impact resistant polycarbonate casing
  • 5m cables and heavy duty clamps
  • IP40 rated (indoor use)
  • Safe spark free operation
  • Reverse polarity protected
  • Short circuit proof
  • 2-year warranty
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Input voltage 220-240V, 50-60Hz, 4.6A
Output voltage 12V, 120A
Start voltage
(minimum voltage to detect a connected battery)
Back current drain Less than 2Ah/month
Ripple current Less than 4%
Ripple voltage Less than 4%
Temperature range -20°C to +50°C (-4°F to +122°F)
Battery types Lead acid: Wet, Ca/Ca, AGM, EFB (Start/Stop types) and Gel
Lithium: LiFePO4
Battery capacity Lead acid: 10-3000Ah
Lithium: 15-1200Ah
Insulation class IP40 (indoor use)
Charge cables length 5000mm (DC cable)
Mains cables length 2500mm (AC cable)
Temperature compensation Built in temperature sensor
USB Type B USB port for software updates and service
Warranty 2 years
Net weight kg
(unit with cables)
13.77 kg
Gross weight kg
(unit in box)
16.02 kg
Dimension mm (HxLxW) 408x226x284mm