If you check the interpolated cycle life at the source, the oldest Teslas have gone through <800 full discharge cycles, so only ~3 years of a phones life. Howe

If you check the interpolated cycle life at the source, the oldest Teslas have gone through <800 full discharge cycles, so only ~3 years of a phones life. However the discharge decreases nonlinearly over time so the Teslas have lost <10% of capacity while a phone loses >30%.