The only battery for an Eberline SK-1 Speaker
The Energizer 504 is the only battery that should  be used in an Eberline Geiger counter speaker. You will see posts here and there about using various other batteries of improper voltage. Why would anyone do this when the correct battery is so readily available and at a great price. The only compliant I have is I wish it was available in a alkaline battery. That said, these carbon-zinc batteries last for many hundreds of hours of continuous use. I highly recommend these in this application.
Rating: 5 stars