Pixel 4a Battery Performance Program: Difference between revisions

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==Restoring battery functionality==

=== Replacing the battery ===

[[#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", which will probably carry the brand name "Amperex Technology Limited".

The battery serial number is printed on the battery.

'''If you have an a Pixel 4a and are comfortable opening the device and attesting to the serial number and brand name, that would be helpful!'''

You may also be able to run the following command over adb shell to retrieve the serial number, but it appears to be in a different format than the number printed on the battery:<ref>https://xdaforums.com/t/where-is-the-source-code-of-the-changes-to-the-pixel-4a-battery.4715642/#post-89930040</ref>

adb shell cat /sys/class/power_supply/battery/serial_number

=== Blocking the update or flashing older firmware ===

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

@@ Line 110: / Line 110: @@
 ==Restoring battery functionality==
+=== Replacing the battery ===
+[[#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", which will probably carry the brand name "Amperex Technology Limited".
+The battery serial number is printed on the battery.
+'''If you have an a Pixel 4a and are comfortable opening the device and attesting to the serial number and brand name, that would be helpful!'''
+You may also be able to run the following command over adb shell to retrieve the serial number, but it appears to be in a different format than the number printed on the battery:<ref>https://xdaforums.com/t/where-is-the-source-code-of-the-changes-to-the-pixel-4a-battery.4715642/#post-89930040</ref>
+ adb shell cat /sys/class/power_supply/battery/serial_number
+=== Blocking the update or flashing older firmware ===
 '''Warning:''' please consider the [[Pixel 4a Battery Performance Program#Safety considerations|battery safety concerns]] before reverting or ignoring updates. Users must evaluate battery health at own risk.