RYOBI USB Charger Battery Pack

thingiverse

Here is the latest rendition of my RYOBI battery hacks. My first one shows how to string the wires, [My Second One](https://www.thingiverse.com/thing:3272684) has an adjustable output voltage converter and now This One is just for USB devices. The circuit boards and heatsinks were inexpensive purchases from Amazon, held in place with a bead of hot-melt glue around the edges. Heatsinks stick on but don't stick well until they sit for a while so I made the lid secure them as well as have an opening to let some heat escape. I charged two dead phones simultaneously and although warm, did not soften the PLA used to print this one. Obviously allow 1.5 to 3% shrinkage if you use a product that shrinks. Note: When pressing the adapter on the battery for the first time, go slow, firm and wiggle slightly. Solid copper wire needs to compress a bit and once on, it's never failed me. If you jam it on, you may break the wire. Guess how I know that?