The Hotronic Extension Cords allow you to move your battery packs from being connected to your boots. 80cm of extra cord space means that you can run the wires up your leg and stash your Hotronic S3 or S4 battery packs discretely in your pocket. 80cm Long, Compatible with S3 and S4 Battery Packs, Battery Heated: No, Model Year: 2018, Product ID: 503833, Model Number: 01-0100-1520, GTIN: 7640121730269