Many companies and investors are eager to recycle batteries but it could take a decade or more before enough used lithium-ion batteries become available.
Meet the new materials overpowering the electric economy.
La popularidad de Tesla ha motivado el surgimiento de una nueva ola de tecnología que ahora está disponible en un monitor de salud pero que pronto podría estar en las gafas, los coches e incluso los aviones.
This week, a more efficient type of battery arrives in a wristband fitness tracker. It could soon reach smart glasses, cars and even aircraft.