The proliferation of electronics, batteries, and solar panels in recent decades has resulted in a substantial generation of end-of-life (EoL) "high-tech" products. Currently, these products follow a largely linear – extract, make, use, dispose – model, but significant effort is underway to transition to a more circular economy in which product and materials are kept in the economy. However, many technical and economic challenges can impede, constrain, and preclude a CE for high-tech products. Here, we discuss several of these challenges and provide specific data, standards, tools, proposed research and development and educational needs to address them. We further argue that a circular economy cannot be achieved by individual efforts alone, but rather necessitates collaboration across disciplines, industry sectors, public and private stakeholders, and geographical regions.