Mr.Power 9V Battery Clip Converter Power Cable Snap Connector 2.1mm 5.5mm Plug for Guitar Effect Pedal (Straight Angle, 2 Cable) Plug for Guitar Effect Pedal (2 Cable)

These are great when you only want to use a few pedals and don’t want to spend time connecting a power supply. Just clip on a battery and plug in the cable. Perfect for short practice sessions.

These are great for the money. Very easy to use, just plug and play. They don’t weigh anything and the quality is phenomenal.

So much better than having to open a guitar pedal to put a battery in

Got these to use with a guitar pedal to eliminate hum. The polarity is correct. No hum.

I bought it for an external guitar preamp which had an internal battery. The internal connection quit working. Rather than plug in to a wall socket while playing in a bar, I purchased this and just hung the battery externally. It worked as needed, and still does.

Excellent product

This makes trying out guitar pedals easy when building them or just getting that new pedal you want to try on its own.

Nothing to love or hate here. I wanted the ability to operate pedals without an AC adapter. Also increasingly small footprint pedals have no internal battery so at a bare minimum you need this or an AC adapter. Some people swear that batteries produce better tones than AC concerted 9V DC. They may be right but my use case wasn't based on that. Just needed something portable for an all-battery situation with no AC.