3 Pin Charging Port Cable - 4 Wire Connection for Smart Balancing Scooters 3 pin replacement charging port cable will fit generic 6.5 inch, 8 inch and 10 inch self balancing board scooter models. This will repair units that are not charging due to a charging cord failure. Other reasons your board may not be charging may be due to a broken charger, defective or broken battery, or a broken motherboard. Check to see your unit uses the 3 board setup that is compatible with this type of 4 wire connection. If your unit uses a 2 wire connection, this piece is compatible but you will need to re-use your old connection by soldering or with wire nuts. Cable is 8.5 inches long. Guaranteed only when purchased from Top Tech and Deals 123. It is highly recommended you disconnect the battery before beginning and take photos of everything before you begin in case something comes loose, you can put it back.