I decided to do a Battery Health Test on my Tesla Model Y to see how well my battery is doing because I noticed I lost ~20 miles in range in 1 year. 


Now I originally got my Tesla Model Y in 2021 and at 100%, it had 326 miles. However, the original battery died, and we received a refurbished battery, where the maximum range was 315 miles at 100%. One year later, my maximum range at 100% is now 295 miles. So I’ve lost ~6% in 1 year. After doing the Battery Health test, I found out that my battery health was 90% and I gained 2 more miles in range. 

I also created a Youtube video about this, that can be viewed here.

tesla battery health youtube

Reasons To Do a Battery Health Test

  1. If you’re buying a Used Tesla, you’ll want to check the battery health 
  2. If you have unexpected battery range loss, you can check your battery health to see if your battery might be covered under warranty for a replacement 

Tesla Battery Warranty

For the Model Y and Model 3 long range and performance, the battery warranty is “8 years or 120,000 miles (whichever comes first), with a minimum 70% retention of Battery capacity over the warranty period” per the Tesla website.  

For the Model S/Y, the battery warranty is “8 years or 150,000 miles (whichever comes first), with a minimum 70% retention of Battery capacity over the warranty period” per the Tesla website.   

Requirements for Tesla Battery Health Test

  1. State of charge <50%
  2. Tesla must be plugged into AC charging station capable of supplying 6kW
  3. Takes 24 hours

Tesla Battery Health Test Steps

1.Drain your Tesla battery to a low state of charge (less than 50%) 

2. Go into “Service” Menu to start Battery Health Test 

    • Go to “Software,” then hold down the vehicle type, enter access code “service” 
    • Go to “High voltage” → “Health Test” 
    • Unlock the gateway by holding right turn signal and pressing down on the brake for 8 seconds

3. When battery health test starts, Tesla will first drain the battery to almost  0% charge, by turning on the fans and heater. 

4. Then Tesla will charge up to 100% 

5. Once it is at 100%, it still needs a few hours to calibrate, do NOT unplug the Tesla charging cable yet. 

6. When you can see your Battery Health percentage, then you are done with the test

tesla service menu
Hold Down to Enter Service Menu
tesla battery health
Tesla Battery Health %


I hope that blog post helped you guys! Check out my Blog post on  How to Maximize RangeDon’t forget to check out my Youtube channel for more content!


The opinions and views expressed on this blog are solely personal, Everyday Chris.  Everyday Chris is not affiliated with or endorsed by Tesla. It is neither inferred nor implied that products recommended by Everyday Chris nor recommendations given by Everyday Chris are authorized by or in any way connected to Tesla. This post contains affiliate links, which means I’ll receive a commission if you purchase through my links, at no extra cost to you. Please read full Terms & Conditions for more information.

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