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Portable Battery Charger and Maintainer with Adaptive Boost Technology

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.


Just charge up CS FREE’s internal battery and keep it with you wherever you go, and it’ll stay fully charged for up to a year.

CS FREE features our revolutionary Adaptive Boost technology to quickly get you going from a flat battery. CS FREE automatically analyses the state of your battery and adjusts to the battery’s voltage level. It then works out the safest and quickest way to give your battery the power it needs to start your vehicle within 15 minutes.

CS FREE works anywhere and can even be powered by solar or a 12V battery for longer term maintenance charging.

Included in the package:

• PD charger
• Power outlet adaptors EU, UK and US
• 1m USB-C to USB-C cable
• 2m detachable DC clamp cable
• User manual

  • 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 and tablets
  • New ergonomic design with a tough and durable case
  • 2 year ‘peace of mind’ warranty

Part number: 40-462

Barcode: 7340103404620

Commodity Code85044055
Weight (kg)2
Length (cm)29
Width (cm)18.5
Height (cm)85

Assets available to download


CTEK CS FREE Product Sheet



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