Pixel 4a Battery Performance Program: Difference between revisions

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[[#Technical evidence of battery changes|Initial reverse engineering efforts]] suggest that you can identify if your battery is bad by looking at the serial number. If you're going to replace the battery outside of Google's program, make sure you're getting a battery with the serial number "8230015901".

The ~~battery~~ serial number is printed on the battery.

The serial number is printed on the battery.

You may also be able to run the following command over adb shell to retrieve the serial number:<ref>https://xdaforums.com/t/battery-update-analysis-and-way-to-detect-affected-battery.4716132/</ref>

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Google has removed all official images for the pixel 4a except the jan 2025 update, effectively removing official images as an option for downgrades <ref>https://developers.google.com/android/images#sunfish</ref>.

=== Flashing a custom firmware ===

'''Warning:''' please consider the [[Pixel 4a Battery Performance Program#Safety considerations|battery safety concerns]] before ignoring the battery update. Users must evaluate battery health at own risk.

Another option is flashing a custom firmware ("ROM") onto the device, such as LineageOS, CalyxOS, or GrapheneOS. Custom ROMs have not adopted the closed source kernel changes that reduce the battery's capacity.

==References==

@@ Line 114: / Line 114: @@
 [[#Technical evidence of battery changes|Initial reverse engineering efforts]] suggest that you can identify if your battery is bad by looking at the serial number. If you're going to replace the battery outside of Google's program, make sure you're getting a battery with the serial number "8230015901".
-The battery serial number is printed on the battery.
+The serial number is printed on the battery.
 You may also be able to run the following command over adb shell to retrieve the serial number:<ref>https://xdaforums.com/t/battery-update-analysis-and-way-to-detect-affected-battery.4716132/</ref>
@@ Line 126: / Line 126: @@
 Google has removed all official images for the pixel 4a except the jan 2025 update, effectively removing official images as an option for downgrades <ref>https://developers.google.com/android/images#sunfish</ref>.
+=== Flashing a custom firmware ===
+'''Warning:''' please consider the [[Pixel 4a Battery Performance Program#Safety considerations|battery safety concerns]] before ignoring the battery update. Users must evaluate battery health at own risk.
+Another option is flashing a custom firmware ("ROM") onto the device, such as LineageOS, CalyxOS, or GrapheneOS. Custom ROMs have not adopted the closed source kernel changes that reduce the battery's capacity.
 ==References==