Question How long do the batteries in the Ditto X2 last Answer If you use two high quality 9V batteries you will get approximately 4 hours of playing time. Please disconnect the Mono input when you do not use the pedal. This turns off the pedal. If you do not, the batteries will continue to drain. Remove the batteries when the pedal is not being used for a longer period of time to save battery life. We recommend using a compatible power supply with the Ditto X2.