Tesla introduced a long-awaited feature in software version 2025.8.3: a battery health test accessible from the car’s centre display. It gives owners of supported vehicles information about the battery’s health and its ability to retain energy compared with its original condition.
Addressing owners’ questions
Battery health is a common concern among Tesla owners. A difference between the advertised range and the figure shown in the car can be worrying, although driving habits and environmental conditions often explain that gap rather than actual battery degradation.
Previously, checking battery health generally meant asking Tesla for a diagnostic test or using an independent workshop. Tesla later introduced a test in Service Mode, but this was not recommended for owners to use directly.
With update 2025.8.3, Tesla brought the test into the normal vehicle interface on the centre display, making it easier for owners of compatible cars to access.
How does the battery test work?
According to early reports from owners who received the update, the car had to remain connected to an AC charger for up to 16 hours while the diagnostic process completed. That was an early reported duration, not a universal time limit: Tesla’s owner instructions allow up to 24 hours. Follow the requirements and warnings shown by the vehicle. Climate controls are disabled during the test, so occupants must not be left unattended inside.
The original report also described the process as helping to recalibrate the battery management system (BMS). Tesla’s manual describes an energy-retention test; it does not promise that the test will repair degradation or provide a guaranteed recalibration benefit. Once complete, the estimated range displayed by the car could change to reflect a more accurate estimate of the battery’s remaining capacity.
Other improvements in update 2025.8.3
Tesla also brought back consumption intervals in the Energy app, allowing owners to review energy use over 10, 100 or 200 miles (15, 150 or 300 km). The battery management system also updates available-energy estimates based on how the vehicle is used, without requiring a manual battery health test.
Full release notes
- View energy consumption over the last 10, 100 or 200 miles (15, 150 or 300 km), with the option to clear the history
- Battery energy estimates update dynamically based on how the vehicle is used.
- Run a Battery Health Test to measure the battery’s energy retention compared with its original condition
- Security improvements and bug fixes
The feature gives owners a clearer, more accessible way to monitor their vehicle’s condition, supporting a better understanding of battery performance and day-to-day use.
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