Vivo X300 users: Can you check your learned battery capacity via bug report?

Hello X300-Users,
I own a Vivo X300 that I purchased at the end of December 2025, so it's been a little over 6 months of use.

I recently started looking into my battery statistics because I felt that my battery life wasn't quite what I expected. I wanted to share my observations and see if other Vivo X300 users can replicate this.

Some background about my usage:

• No gaming at all.
• No heavy usage.
• Mostly YouTube, Instagram, browsing, messaging, and general scrolling.
• Occasional photography and videography.
• I usually charge the phone only up to 80–90%.
• I charge to 100% only when I know I'll be away from a charger for a long time.
• I don't intentionally stress the battery.

Battery information:

• Advertised (typical) capacity: 6040 mAh.
• Rated/design capacity printed on the battery: 5925 mAh.
• Battery Health shown in Settings: 99%.

I'm also attaching a picture of the actual Vivo X300 battery from a teardown video, where the battery label shows the rated/design capacity as 5925 mAh. This is the source of the rated capacity figure mentioned above.

What I observed:

When I generated Android bug reports over the last month, the "learned battery capacity" values changed over time.

Approximately:

• Around 5550 mAh when the phone was new (I checked this shortly after unboxing).
• After a full 0% → 100% charge cycle and recalibration attempt, it now reports (the report was generated and checked on 13/06/2026):

Estimated battery capacity: 5471 mAh
Last learned battery capacity: 5471 mAh
Min learned battery capacity: 5471 mAh
Max learned battery capacity: 5471 mAh

I am NOT claiming that Vivo is scamming people or that my battery is defective. I genuinely don't know what these values actually represent.

I just have two questions for the community:

1. Can other Vivo X300 users generate a bug report and check their learned battery capacity values? Please mention:

• How old your phone is.
• Your Battery Health percentage.
• The learned battery capacity value you find.
• Your general usage pattern (gaming/heavy use/light use).

1. Is there a better or more accurate method to estimate actual battery capacity on Android without specialized hardware? If so, please let me know.

How to check the learned battery capacity:

• Enable Developer Options.
• Open Developer Options.
• Tap "Submit bug report" (or similar wording depending on software version).
• Select "Full report".
• Wait for the bug report to generate.
• Open the Files app.
• Go to Storage > Bug Reports.
• You'll see a ZIP file along with some other files.
• Copy the ZIP file to a computer.
• Extract the ZIP file.
• Inside, there will be a very large TXT file (often 40–50 MB or more).
• Open it using VS Code (Visual Studio Code) or another editor capable of handling huge text files.

Do NOT try opening the large TXT file on your phone, and regular Notepad may struggle or freeze because of the file size.

Search within the TXT file for:
"Estimated battery capacity"
or
"Last learned battery capacity"

Please share your results in the comments.

I'm genuinely curious whether this is just how Vivo/Android estimates battery capacity, or if many X300 users are seeing similar values.