Replay Guitar Exchange loves guitar and bass effects pedals, but sometimes you might choose to power up without batteries, or you might lose your original power supply, or the original effect pedal never came with a power supply. You’re in luck with the D'Addario PW-CT-9V power adaptor, which delivers 9V DC with a maximum current of 500mA. The tip is negative. This power supply is D'Addario's new slim style and can deliver more power on demand. It also generates less heat than the previous 300ma version. This supply delivers standard power supply specs, but always check your pedals to be sure these specs match your pedal’s requirements. Some effects pedals require different voltages and draw different currents than this power adapter can safely deliver. Chat, email or call Replay Guitar Exchange if you have any questions about this power adapter and its use with your gear.