Lithium Profile

Lithium Profile

  • CS Free

    CTEK CS FREE is the world’s first truly portable battery charger and maintainer with Adaptive Boost technology.

    You can charge and maintain any 12V lead-acid or lithium vehicle battery anywhere without being connected to a power outlet. And if your battery’s flat, CS FREE’s revolutionary Adaptive Boost technology will get you going within 15 minutes.

    Portable charging and maintaining you can take anywhere without being tied to a power outlet
    Internal battery lasts up to a year when fully charged
    Adaptive Boost, to safely get you going from a flat battery within 15 minutes
    • Can be charged up and powered by solar or 12V battery for longer-term maintenance charging
    • No modes to select – just turn it on, connect and the CS FREE will do the rest
    • Countdown function shows you how long there is left before your battery is fully charged
    USB-C and USB-A outputs for charging tech like laptops, smartphones & tablets
    • New ergonomic design with a tough and durable case
    • 2 year ‘peace of mind’ warranty


    Additional Accessories available include:

    • Alligator clips for the DC input so you can use a battery to charge another battery. (DC to DC charger)
    • Solar Panel (60W) to recharge the onboard battery or pass-through to charge anything connected to the CS Free's USB-A, USB-C or Alligator Clips.
    • Cig Plug DC input so you can charge your CS Free from a cig-plug adaptor. This allows you to recharge the internal battery and charge/power the outputs.
    INPUT USB-C 5 VDC – 25 VDC, 3 ADC/60 W max
    OUTPUT 12 V, 20 A/240 W max
    AMBIENT OPERATING TEMPERATURE -20 ˚C to +50 ˚C (- 4 °F to +122 °F)
    AMBIENT STORAGE TEMPERATURE -20 ˚C to +45 ˚C (- 4 °F to +113 °F)
    BATTERY CHEMISTRY Lead acid, Lithium
    WARRANTY 2 years
    DIMENSIONS (L x W x H) 248 x 98 x 78 mm
    USB-A OUTPUT 5 VDC, 2.4 ADC/12 W max
    USB-C OUTPUT 5 VDC, 9 VDC, 12 VDC, 15 VDC, 20 VDC, 3 ADC/60 W max
    INPUT 100 VAC – 240 VAC, 50 Hz – 60 Hz, 60 W max
    OUTPUT USB-C 5 VDC – 20 VDC, 3 ADC, 60 W max
    CAPACITY 66 Wh
    CELL CHEMISTRY Polymer Lithium-Ion
    CELL TYPE Pouch Cell
    DISCHARGE TEMPERATURE -20 ˚C to +50 ˚C (- 4 °F to +122 °F)
    CHARGE TEMPERATURE 0˚C to +45˚C (32˚F to 113˚F)
    SHELF LIFE 1 year
    LIFE SPAN 300 cycles, 80%


  • PRO15S

    The PRO15S is a powerful and fully automatic 15A battery charger and maintainer, compatible with any 12V battery, including Lithium-Ion (LiFePO4). Safe, strong & robust, it can handle heat, dust & humidity. Combining fast and powerful charging with long-term maintenance capability, the PRO15S is the ideal charger for the workshop, the car, the caravan or the boat.

    • Charges and maintains batteries from 20 Ah up to 350 Ah (20-300 Ah for lithium).
    • Recond program.
    • Power supply for 12 V equipment.
    • Automatic temperature compensation for high efficiency.

    Technical Information
    Warranty; 2 years
    Battery Types; 12V lead-acid batteries, 12V lithium (LiFePO4) batteries
    Battery capacity;LEAD-ACID:20-275Ah, LITHIUM: 20-300Ah
    Battery capacity (maintenance); 350Ah
    Charge cables length; 2000 mm (DC cable)
    Mains cable length; 1900 mm (AC cable)
    Insulation Class; IP44 (outdoor use)
    Model Number;40-192

  • PRO25S

    Highly efficient 25A battery charger & power supply

    For everyday professional use

    The PRO25S is an innovative, versatile and highly efficient 25A battery charger and power supply, designed around the needs of the automotive professional. Combining power & advanced technology with safety, portability and flexibility to work with any 12V vehicle battery including Lithium-Ion (LiFePO4), the PRO25S is the perfect solution to professional battery charging, in the workshop or the showroom.

    Advanced technology will ensure that a safe, fast charge is delivered to exactly meet the needs of the individual battery. The PRO25S has a dedicated lead-acid battery reconditioning programme to restore battery life & recondition flat batteries. SUPPLY mode will support the battery during diagnostic or fault finding work. It has low voltage & current ripple, so it’s safe for the battery & the vehicle’s delicate electronic systems. Fully automatic & easy to use, it’s also very simple to connect, spark proof and reverse-polarity protected to protect the user & also the battery. The PRO25S is designed to ensure easy handling in both the workshop & the showroom. Whilst it’s lightweight & portable, the rugged, impact-resistant casing means it can also handle the toughest workshop environment.

    • Dedicated Lithium-Ion (LiFeP04) mode
    • Compatible with batteries from 40Ah to 500Ah (30Ah to 450Ah LiFePO4).
    • SUPPLY mode to support the battery during diagnostic or fault-finding work.
    • Fully automatic, easy to use and simple to connect
    • Spark proof
    • Reverse-polarity protected.
    • Integrated safety features, so it’s safe for the battery & the vehicle.
    • Built-in temperature sensor to achieve maximum charge levels
    • Dedicated lead-acid reconditioning programme to restore battery life and recondition flat batteries.
    • Lightweight & highly portable
    • Tough & robust

    Technical information
    Ambient temperature; -20˚C to +50˚C
    Positioning; Portable, Wall mounting (with special kit)
    Warranty; 2 years
    Input; 220–240VAC, 50–60Hz, 2.9A max
    Output; 14.4V/15.8V/13.6V, 25A max, lead-acid battery types. 13.8V/14.4V/13.3V, 25A max, LiFePO4.
    Start voltage; 2.0V
    Back current drain*; Corresponding to less than 1Ah/month
    Battery types; 12V:, WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO4
    Battery capacity; 40–400Ah, lead-acid battery types. 30–450Ah, LiFePO4
    Battery capacity (maintenance); 500Ah
    Charge cables length; 2000 mm (DC cable)
    Mains cable length; 1900 mm (AC cable)
    Net weight (unit with cables); 1.8 kg
    Gross weight (unit in box); 2.2 kg
    Insulation class; IP44 (outdoor use)
    Ripple**; Less than 4%
    Model Number; 40-200