This is The Stepback , a weekly newsletter breaking down one essential story from the tech world. For more on e-bikes, power stations, and how to work anywhere , follow Thomas Ricker . The Stepback arrives in our subscribers’ inboxes at 8AM ET. Opt in for The Stepback here . How it started Lithium-ion batteries are everywhere as we enter the second quarter of the 21st century, and that’s a problem. From exploding e-bikes in stairwells to lithium-ion power banks combusting midflight , the