The battery percentage looks wrong. There may be sudden jumps in the displayed battery percentage, early shutdowns, or low-battery warnings and error codes.
The battery percentage drains abnormally fast, or the vehicle shuts down even though the display shows more than 0%. This tends to happen right after a software update.
The battery has a built-in automatic calibration algorithm. When the battery is fully charged or fully depleted, it automatically runs a calibration process to correct accumulated battery-level error.
It is recommended to fully charge the battery each time to maintain optimal performance. The battery algorithm is continuously improved to optimize performance and user experience, which is why a full charge is needed after every OTA update.