“This 3D printed solar USB charger is inexpensive and easy to make. It’s compatible with almost any device that charges via USB. In direct sunlight it is capable of charging the internal battery at about 500 mah, and can deliver 1000 mah to devices. Here’s the tools and supplies you’ll need:
Tools:
Fine tip soldering iron and solder
Epoxy or super glue
Scissors or wire cutters
Supplies:
3D printed enclosure
PowerBoost 500 charger
2.5w solar panel
Panel mount USB port
1N4001 blocking diode
Lithium ion battery and battery holder
Panel mount power button
Hook up wire”