Solid-state batteries still aren’t ready, but gels are

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 volatile nature of traditional liquid electrolytes has become an undeniable public safety hazard.

In 2025, the US Consumer Product Safety Commission (CPSC) i …

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