The battery breakthrough, explained

Silicon anodes are shipping in real phones. A battery engineer explains what that means for charge times, lifespan and the phones you buy next year.

 The battery breakthrough, explained

For once the word breakthrough is earned, mostly.

- Silicon anodes: more capacity, same size
- The swelling problem and how it was tamed
- Realistic expectations for next year's phones

Chart: energy density by chemistry, in the show notes.