2025.8.3 Release Notes: Tesla Battery Health Test is Here

Tesla has started rolling out its 2025.8.3 software update and it includes updates for the Consumption page, battery energy estimates and also a new Battery Health Test.

What does the Battery Health Test do? You run the test and it tells you how much retention your battery has now, compared to when it was new. Here is the text from the Battery Health screen:

Your battery’s energy retention is within the expected range based on its age and mileage.

Like all rechargeable batteries, your vehicle’s high-voltage battery becomes less effective over time with age and use. To help maintain energy retention, keep your vehicle plugged in when not in use and charge it to the recommended limit. For more details, refer to the Owner’s Manual.

You can optionally run a Battery Health Test to compare your battery’s current energy retention to when it was new. To perform this test, your vehicle must remain connected to an AC charging station for up to 18 hours. Once complete, the range estimate displayed in your vehicle may be recalibrated.

Test results are valid for up to six months. After they expire, you will have the option to run a new test.

Now, before you start the test, here is the warning message from Tesla:

To complete the Battery Health Test, your vehicle must remain connected to an AC charging station for up to 18 hours. Tesla recommends using a Tesla Wall Connector or Mobile Connector, as third-party and pay-per-use AC chargers may cause the test to fail or produce unexpected results.

During the test, your vehicle’s battery will discharge to below 10% and then recharge to 100%. Climate control systems will be temporarily disabled, and most vehicle features will be unavailable. Do not leave occupants unattended.

Avoid interacting with your vehicle or the Tesla app during the test. You can cancel the test at any time using the vehicle’s touchscreen or the Tesla app. If the test fails or is canceled, the vehicle will attempt to charge back to the set limit.

Before You Begin

• Vehicle is in Park

• Battery level is 20% or less

• Vehicle is connected to the internet

• No software updates are scheduled

• No battery or thermal alerts are active

• Vehicle is connected to an AC charging station

• AC charging equipment must provide at least 5 kW of power

This will be interesting to check out and will require being plugged in for up to 18 hours, so hope you’re not going to be going anywhere.

That aside, here are Tesla’s 2025.8.3 release notes below (via @Tessie):

Minor Fixes

Included in 2025.8.3

• This release contains minor fixes and improvements.

Minor Updates

Included in 2025.8

• View your last 10, 100, or 200 miles (15, 150, or 300 kilometers) of energy usage in the Consumption page, with the option to clear your history.
  • Go to App Launcher > Energy app > Consumption.
• Your battery’s energy estimate now adjusts over time based on your vehicle’s usage characteristics, while the total available battery energy remains unchanged.
• A Battery Health Test is now available to measure your battery’s energy retention compared to when it was new.
  • Running this test may recalibrate the energy estimate, potentially affecting the displayed range.
  • Go to Controls > Service > Battery Health.
• This update includes important security fixes and improvements.

Minor Updates

Included in 2025.2.3

• Minor fixes and performance enhancements have been applied.
• This update includes important security fixes and improvements.

Third-Party Fast Charger Preconditioning

Included in 2025.2

• Your vehicle now supports preconditioning for additional third-party fast chargers, even if they aren’t listed on the charger list.
• Simply set a fast charger as your destination, and battery preconditioning will start automatically when needed to optimize charging performance.

Rear Cross-Traffic Chime

Included in 2025.2

• When you shift into Reverse, a warning sound will play from the direction of an incoming object detected crossing behind you, such as a vehicle or pedestrian.
  • Go to Controls > Safety > Rear Cross-Traffic Chime to enable or adjust settings.

Minor Updates

Included in 2025.2

• Weather information is now displayed for both the final destination and waypoints in your route’s turn-by-turn list.
• The Battle of Polytopia – “The Forgotten” Aquarion Skin
  • This update includes a new Aquarion skin, new languages, and balance changes.
• Minor fixes and performance enhancements have been applied.
• This update includes important security fixes and improvements.

Camera Visibility Detection

Included in 2025.2.8

• At the end of your drive, you will receive a notification if poor camera visibility is detected.
  • To view images, go to Service > Camera Visibility.
• Images do not leave the vehicle and are not shared unless Data Sharing preferences allow it.
• Images are automatically deleted after two days.
  • To review Data Sharing settings, go to Software > Data Sharing.

Tesla update 2025.8.3 : Now we can launch the battery health test via controls->service->Battery Health pic.twitter.com/RdUxZIZMFe

— Eymeric63974 🇷🇪 (@Eymeric63974) March 18, 2025