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Battery health

How to judge a used pack before you buy: on-screen checks, a drive test, range math, and the warranty that is left.

  1. 01Battery healthHow to Check a Used Tesla's Battery Health Before You BuyA veteran used-car buyer's step-by-step battery check for a used Tesla: Service Mode fault check, the 100% charge-and-drive test, the on-screen Battery Health test, range math, and the red flags that should end the deal.October 23, 2026 · 9 min read

Still to write

  • PlannedLFP vs NMC and NCAHow to tell which high-voltage pack is in the car, and how the daily charge advice differs. The Model 3 guide points here. Not written yet.
  • PlannedService Mode, in more detailA closer look at opening Service Mode and leaving it the way you found it. The battery guide has the short version.