YouTubers publish Tesla battery health tests

Enhance, the YouTube channel tied to the S3XY Buttons accessory brand, published a May 13 video showing battery health tests on three Tesla vehicles: a base 2026 Model Y, a 2024 Model 3 Highland and a 2019 Model 3 Performance. The video used Tesla’s built-in Battery Health Test rather than a third-party tool, and the creator presented on-screen tables with state-of-health readings, mileage and battery chemistry. Tesla says the test is designed to evaluate energy retention using data from the battery management system and can take up to 24 hours on AC power. ### Which Teslas were tested, and what numbers did the video show? Enhance said the sample included a 2026 rear-wheel-drive Model Y, a 2024 Model 3 Highland and a 2019 Model 3 Performance. The company’s companion post said the two newer cars used 60 kWh LFP packs, while the 2019 Model 3 Performance used an NCA lithium-ion pack. The on-screen results summarized in Enhance’s post showed 100% battery health for the base 2026 Model Y, 93% for the 2024 Model 3 Highland at nearly 40,000 kilometers, and 83% for the 2019 Model 3 Performance at nearly 100,000 kilometers. (youtube.com) Enhance described the Highland result as 7% degradation in a little over two years. ### How was the test run? Tesla’s owner documentation says drivers start the check from Controls, then Service, then Battery Health, and the car compares retained energy with expected retention for that battery type, age and usage. (youtube.com) Tesla says the optional Battery Health Test requires an AC charger supplying at least 5 kW, a battery level below 20%, no pending software updates and no active battery or thermal alerts. (enhauto.com) Tesla says the process can take up to 24 hours, may discharge the pack to 0%, and disables features including Sentry Mode and climate control while it runs. The company also says owners should avoid interacting with the vehicle or mobile app during the test because that can interrupt the process. ### What do the results actually measure? Tesla says the touchscreen displays “a percentage that reflects the energy retention” of the battery compared with when it was new. (tesla.com) The company’s manual says that figure is based on battery-management-system data and is evaluated against expected retention for the pack’s type, age and use. Enhance framed its video as a direct look at degradation across different Tesla generations rather than a formal fleetwide study. (tesla.com) The sample size was three vehicles, and the creator said some outcomes were expected while others were surprising. ### Why are YouTube creators publishing these tests now? Tesla has made battery-health information more visible in recent software and owner documentation, and that has given owners a simpler way to publish comparable readings without entering deeper service menus or relying on outside diagnostics. (tesla.com) Recent YouTube videos from other Tesla-focused creators have also centered on the same built-in test and on real-world range checks tied to degradation. (youtube.com) Drive Protected, another YouTube channel, published a separate April 11 video on a 610,000-kilometer 2019 Model 3 and followed it with a real-world range test posted this week. Those videos did not use the same three-car comparison format as Enhance’s May 13 upload, but they show the same push by creators to turn battery-health data into public owner case studies. ### Where can owners see the underlying Tesla guidance? (tesla.com) Tesla’s Model 3 owner documentation says the Battery Health screen is available through the car’s service menu and that some vehicles may not be equipped with the full test feature. The company says the result is an evaluation of battery energy retention and recommends using the full test when there is a concern about high-voltage battery retention. (youtube.com) Enhance’s video remained live on YouTube on May 14, and the company’s companion article repeated the three headline results and the test steps. Tesla’s owner manual continues to list the Battery Health feature and its requirements, including AC charging and up to 24 hours to complete the test. (youtube.com) (tesla.com)