Slow Charging Didn’t Save This Tesla’s Battery

From Branden Flasch.

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I bought a new-to-me 2023 Tesla Model Y Long Range AWD with 111k+ miles and decided to run a full battery health test to see how it’s holding up. What surprised me: this car only has about ~2 MWh of DC fast charging logged, over 40 MWh of AC charging, and ~4.8 MWh recovered from regen — almost completely AC-charged its life, yet the pack still tested poorly.

In the video I show the charging stats, the 2,451-mile drive I did from California back to North Carolina (which nearly doubled the DC charge counter), and the full battery health test — I discharged to ~2% and charged for about 15 hours. The test added ~62.16 kWh (68.7 kWh used), gave ~265.7 rated miles, average battery temp hovered around 100°F, and the final measured health came back at 77% (third-party tool Tessie shows ~81% / ~63.8 kWh and ~600 charge cycles).