Mastering the Tesla Battery Health Test: A Comprehensive Guide

Recently, I encountered an issue with the front passenger safety restraint in my Tesla. My wife had mentioned that she spilled water on the seat, which led to the problem. After using a hair dryer and some heating techniques, the issue seemed to resolve itself. This incident prompted me to test the battery health of my Tesla, particularly because we had previously replaced the battery. I wanted to see if there was any significant degradation in the battery’s performance.

The Model 3 and Model Y come with a warranty for 8 years or 120,000 miles for 70% battery retention. This is valuable information, especially for those considering purchasing a used Tesla. Additionally, if you feel that your battery range has substantially decreased, performing a battery health check can help determine if you are eligible for a battery replacement under warranty.

When we first received our Model Y, it was estimated to have a range of 323-325 miles. However, after a high voltage battery replacement, the range dropped to 315 miles. This slight decrease was a cause for concern, and I was eager to see if the battery health test would provide some insight into the overall health of the battery.

To conduct the battery health test, I charged the car to 100% and then let it drain to nearly zero before recharging it. The test required the vehicle to be plugged into a six-kilowatt AC charger and could take up to 24 hours to complete.

During the test, I encountered some unexpected challenges. At higher battery percentages, the car aggressively tried to drain the battery, which was accompanied by significant noise and heat. As the battery percentage lowered, the process became slower and less noticeable. It almost took 24 hours to complete the test entirely.

Ultimately, the test showed that my battery health was at 90%, and I gained an extra two miles in range. Despite the minor increase, I was relieved to see that the battery health was satisfactory, considering the mileage on the vehicle.

Performing a battery health test on your Tesla can provide valuable insights into the overall condition of the battery and determine if any warranty-covered replacements are necessary. It’s an essential step for Tesla owners, especially those concerned about battery degradation. The process may have its challenges, but the results can offer peace of mind and ensure the vehicle’s continued performance.

Thank you for reading!

What could be the problem with the front passenger safety restraint in a Tesla?

It was discovered that spilled water on the seat might have caused a sensor to trip, leading to the issue. Using a hair dryer and heating the seats helped resolve the problem.

Why should I test my Tesla’s battery health?

Testing battery health is recommended for used Tesla buyers to check the battery’s condition and range. It’s also useful for Tesla owners experiencing drastic reduction in battery range to assess potential warranty coverage for battery replacement.

How can I test my Tesla’s battery health?

To test the battery health, the car needs to be drained to a low percentage and then charged back up to 100%. The battery health test can be initiated from the high voltage menu in the car’s software. The test will take up to 24 hours to complete and requires a 6 kilowatt AC charger.

What were the results of the battery health test?

After running the battery health test, it was found that the battery health was at 90% with a range of 296 miles, gaining an extra 2 miles from the previous range. The test took almost a day to complete.

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