This Technical Note discusses USB charge port specifications and how they apply to renewable energy products. It is intended as an introduction and resource for manufacturers and other industry stakeholders on the history and application of complex USB technical standards as they pertain to mobile device battery charging.

This document was produced by Lighting Global Quality Assurance. In February 2020, Lighting Global Quality Assurance evolved to become VeraSol, an independent program offering quality assurance services for solar energy kits and off-grid appliances.