S Yuasa Lithium-ion cells have been delivered to the International Space Station (ISS) for the fourth time in June 2020. The transfer marks the successful completion of battery deliveries to support a project to upgrade the craft’s battery system. Since the initial delivery in December 2016, GS Yuasa have supplied 24 of their state-of-the-art Li-ion cells to the spacecraft, replacing the older nickel-metal hydride (NiMH) cells previously used. Due to the high energy density for their mass, just 24 of GS Yuasa’s Li-ion cells are needed to replace 48 of the NiMH batteries previously used. The new batteries will be replaced by astronauts during space walks outside the space station over the coming months.