This cigarette lighter to USB-C cable can be used with a fused battery-clamp cigarette socket to power a CTEK CS FREE from a separate spare battery. Excellent service from SportsBikeShop. I originally needed the CTEK clamp-to-USB-C cable, but it was almost impossible to source. SportsBikeShop kept me updated and supplied this as a practical alternative. It allows me to charge and maintain a car battery remotely where no mains power is available. Genuine product, good communication and fast delivery.