Filmmaker uses COVID-19 work lull to make and sell $10 3D-printed camera battery cases

A documentary film maker from Utah has designed and built a series of battery holder magazines that he says help to solve the problem of knowing which batteries are fresh and which are depleted. The 3D printed magazines hold three or four batteries from common cameras and allow the batteries to be inserted contacts up for dead batteries and down for fresh ones. Tim Irwin, who is printing the magazines in his basement, had been meaning to come up with a solution to this problem for a while, and h...