Ryobi USB Power Supply

thingiverse

If you're like us, you live in an area with occasional power outages (darned above-ground power lines!). In a situation like that, if you have some power tool batteries on-hand, it's handy to be able to keep your cell phone alive in the interim. I've got a number of Ryobi power tools using One+ 18V batteries (and unlike my USB batteries, the Ryobi batteries are always charged), so since Ryobi no longer sells a USB charger, I made my own. You'll need some contacts -- you can use [these from Mouser](https://www.mouser.com/ProductDetail/Keystone-Electronics/204?qs=sGAEpiMZZMt13fpse6CWDYVh9FApKpUCUG94EaYtwxc%3D), or [these from Digikey](https://www.digikey.com/short/j9728p), and a USB socket that can handle either 12V or 24V input -- [like this one on Amazon](https://www.amazon.com/gp/product/B07SGJ5DN4/). A bit of simple soldering later, and you're done. This comes in two parts -- a bottom plate, and a top (tower) piece. Glue them together with cyanoacrylate glue ("super glue") or epoxy. I remixed both from [this excellent starting point](https://www.thingiverse.com/thing:1234683). *Update:* Make sure you check out [Chris Nafis](https://www.thingiverse.com/nafis/designs)' excellent [connector cover](https://www.thingiverse.com/thing:4561390) for this design. Covers the electrical parts, keeps the battery clips from sliding around, makes it all look tidier; attach the cover with hot-melt glue, and you can remove it later if you have issues / need to re-solder the clips or whatever.