Hi Ross, a small adapter is available, using four V386 batteries. It contains a small resistance which brings the voltage down to the right level. I think you can get it at www.minoxlab.com, or if you are in europe at www.minoxbeimeister.de. It is designed for the Minox 8X11 cameras, but I have used it in a Minox 35 without problems. The right solution for the Minox 35 cameras is to obtain a new battery holder that fits exactly in the camera, and holds the four batteries. I think they are also available at Minoxlab, but I am not sure. Be sure to specify the camera when ordering as the battery holder is different on most of the Minox 35 cameras.