This item has been discontinued and replaced by the CTEK Comfort Indicator Cig Plug which can be found here.
CTEK Comfort Connect Cig/Lighter Plug
Charge through the cigarette outlet
CTEK Cig-Plug (Part No. 56-263) enables charging the battery through the cigarette outlet. It eliminates any hassle, simply charge from within the car, perfect for CTEK’s battery chargers with Comfort Connect. Comfort connect chargers include: UC 800, US 800, MULTI US 3300, MULTI US 7002, US 0.8, and MUS 4.3.
Note: that the vehicle needs to have power on the cigarette outlet when not in use. CTEK Cig-Plug fits both 12 millimeter and 21 millimeter outlets and has a maze-like strain relief for the user’s safety.