The first 1000 people who click the link will get 2 free months of Skillshare Premium: https://skl.sh/greatscott2 Previous video: https://www.youtube.com/watch?v=7-djg27lJyQ Make your own Photovoltaic Off-Grid System: https://www.youtube.com/watch?v=WU16AJwvNhE 100W Solar panel || DIY or Buy: https://www.youtube.com/watch?v=6_3gK83bePQ Electronic Basics #29: Solar Panel & Charge Controller: https://www.youtube.com/watch?v=sU-hSFFwSmo Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Support me for more videos: https://www.patreon.com/GreatScott?ty=h More project information (pictures, .stl file,......) on Instructables: https://www.instructables.com/id/DIY-5V-USB-Portable-Solar-Power-Charger/ Parts list (affiliate links): Solar Cell: https://s.click.aliexpress.com/e/_dUOfklv Tapping Wire: https://s.click.aliexpress.com/e/_d6VRGYP Flux Pen: https://s.click.aliexpress.com/e/_dX8env9 Solder: https://s.click.aliexpress.com/e/_d6H6ixH Buck/Boost Converter: https://s.click.aliexpress.com/e/_dXWqLTh Epoxy Resin: https://s.click.aliexpress.com/e/_dSrlysP In this episode of DIY or Buy I will have a closer look at a commercial 5V USB portable solar power charger. After measuring its output power and pretty much "short reviewing" the product, I will try to make my own DIY version that should cost around the same while outputting more power! Let's get started! This video was sponsored by Skillshare. Music: 2011 Lookalike by Bartlebeats