The battery snap cable allows battery-operated effects without a DC power jack to be powered from a Pedal Power® isolated output. The PPBAT features a 2.1mm straight barrel connector on one end to connect to the power supply and a 9V snap connector on the other to connect to the pedal’s internal 9V battery snap connector. This cable works with any standard center negative polarity effect that runs on a 9V battery. PLEASE NOTE: The battery snap cable is intended for use with a Pedal Power supply for powering standard polarity (center negative) 9V pedals. It will not work similarly if it is instead connected to a 9V battery.