Electro Harmonix 9V Battery Vintage Style

The Electro-Harmonix 9Volt battery is the classic carbon zinc type that has a higher internal resistance than an alkaline battery. This reduces circuit loading, especially in vintage effects pedals, to provide the best tone and dynamics.

These are the type of battery Eric Johnson uses in his fuzz faces and they do sound warmer with this type than alkaline.

In swedish - brunstens batteri.