C Battery Eliminator

In the past, I've had some devices which required C batteries, mostly LED lights. I'd use a large dowel rod and a screw, but with 3d printing no need to get the dowel...

Using these devices for auxiliary lighting could continue to use quite a few batteries. My lamp, for example, requires 3 C batteries, at 1.5 volts each equals 4.5 volts, or close enough to use a USB 5v power supply. Even with multiple batteries, many of these devices wire the batteries in series, so you only need to make