The CTEK INDICATOR EYELET M8 connector is ideal for charging and checking batteries that are difficult to get to or hidden. The LED ‘traffic light’ system shows your battery’s charge status simply and clearly. Connect the eyelet terminals to the battery, check the status, then plug the connector into your CTEK charger if the battery needs
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My intention was to use this unit to run a line out to the edge of the car body to avoid opening the hood. My plan was to use the LED light to give me a quick view of my battery status without opening the hood. Unfortunately, the wire was only about 18 inches long. I solved it by adding additional length. If you intend to open the hood, it is completely sufficient. It is a nice accessory.