Blog

Notes on battery data and the pivot

September 27, 2026

Finding the Signal: a 22-Cycle Improvement I'm Not Ready to Call Conclusive

Switching from point-in-time capacity metrics to discharge curve-shape features improved battery cycle-life predictions — but the honest verdict is 'promising,' not 'done.'

September 20, 2026

My First Battery-Life Model Failed to Beat a Coin Flip. Here's Why That Was the Right Result

Four features, two linear models, and an honest negative result: what happened when I tried to predict lithium-ion cycle life from obvious capacity and resistance metrics.