https://www.theverge.com/2021/9/8/22662979/whoop-fitness-tracker-sila-silicon-anode-battery-electric-cars https://www.theverge.com/2021/9/8/22662979/whoop-fitne

https://www.theverge.com/2021/9/8/22662979/whoop-fitness-tracker-sila-silicon-anode-battery-electric-cars https://www.theverge.com/2021/9/8/22662979/whoop-fitness-tra... Appears to be first mass commercialization of the tech.