Ok, worst-case scenario.... You are about to play yet another gig that will make you even more rich and famous. This time, you have everything(including drumsticks, see http://www.instructables.com/id/Garage-Band-Chopstick-Drumsticks-for-under-five-bu/ ) and are ready to perform. Just one more check... -Guitar -Amp -Drums -Drumsticks -Drummer Looks right! But wait! The pedal has no batteries! In this instructable, I will show you how to make a temporary power supply for a KORG "Toneworks" guitar multi-effect pedal
http://www.instructables.com/id/Makeshift-power-supply-for-your-guitar-pedal/