Ryobi One+ Double Battery Pack 18V

This is a battery pack to use two Ryobi One+ batteries with a tool (https://youtu.be/KomE9KIKsI4). It has mounting points for two batteries (any kind of Ryobi One+ battery is supported) and a switch to select which battery is powering the tool. This does not link the batteries in series and does not increase voltage to the tool. (You could wire it differently and run your tools at higher voltage but you wouldn't do that, would you?) (Don't. But if you do, record it and put it on YouTube!) *Note: this may not work with all tools -- think about the direction of the battery socket and how much space there is around it for the tool you want to use. (For example, this would not work with my Ryobi circular saw since one of the batteries would extend below the saw shoe.)

This design borrows heavily from flyingaz's Milwaukee to Ryobi Battery Adapter design (https://www.thingiverse.com/thing:1677812) and simhopp's USB Power Bank for Ryobi 18v One+ Battery (https://www.thingiverse.com