Using this adapter is super easy. First, take a 9V battery and plug it into one end of the cable. Then, connect the other end to a device that has a 5.5x2.1mm, center - positive barrel jack. Make sure the battery is properly inserted and the connection is secure. When not in use, store it in a dry place. Avoid bending the cable too much to prevent damage. If you notice any signs of wear or tear, it's time to get a new one.
