Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
DIY Solar USB Charger: 7 Steps (w/ Photos) - Footprint Hero
How to Build Solar Powered Mobile Phone Charger Circuit – QuartzComponents
DIY Solar USB Charger: 7 Steps (w/ Photos) - Footprint Hero
Amazon.com: Kitables DIY USB Solar Panel Portable Charger Kit | Build Your Own Portable Phone Charger for iPhone, iPad, and Android | Perfect for STEM Curriculum,Wood,kit-Solar-Charger : Cell Phones & Accessories
How to make a 5V Foldable Solar Panel Phone Charger | DIY Charging on the go - YouTube