An ode to making sure you have the power to listen to your homemade cassettes in even the most remote locations, “Box Batteries” is perhaps the most rocking song from Non-Believers and captures of the spirit of the album. The special 7-inch version features a pounding Farfisa, various types of distortion, and a tireless drum machine. The non-LP B-side “Whatever Light” is likely set about 10 years after the A-side and showcases human drumming and instrument-playing.