The CTEK CS Free is an all-in-one solution to power up flat batteries and keep vehicle batteries in peak condition, replacing jump cables entirely. Its Adaptive Boost technology powers up a flat battery swiftly and safely, without risk of damaging the battery or vehicle electronics.

For off-grid use, CS Free charges and maintains any 12V lead-acid or lithium (LiFePO4) battery via a solar panel or a separate service battery. It also doubles as a power bank, with USB-C and USB-A outputs for charging laptops, smartphones, and tablets. Operation is straightforward, with no modes to select, simply connect and the unit handles the rest, while a countdown function shows when there is enough power to start the vehicle and the remaining time to full charge.

Key Features

• All-in-one flat battery power-up and vehicle battery maintenance
• Adaptive Boost technology replaces jump cables
• Charges via power outlet (included USB-C adapter), solar panel, separate service battery, or vehicle cig-socket (using optional USB-C CTEK accessories)
• Not compatible with CTEK Connect or Indicator accessories
• Charges and maintains any 12V lead-acid or lithium (LiFePO4) battery
• User-friendly with straightforward operation and clear displays
• No mode selection required, simply connect
• Countdown function for start-up readiness and time to full charge
• USB-C and USB-A outputs for charging devices
• Robust, durable housing
• 2-year warranty

Technical Specifications

Specifications