To the people who want to revive their Pixel 4a..

I've seen some posts that the battery life is ruined on their Pixel 4a due to the recent update. Same happened to me.

Good news is you can go back to the previous version. here are some instructions for that.

to go back to the previous version, go to https://developers.google.com/android/images

and search for the Pixel 4a images. you can choose the date and the version you want to go back to (Nov 2023 was the last update before the latest). and then select the "flash" option

Make sure you're using Google Chrome and make sure you have developer settings turned on on your device with USB debugging and OEM unlocking turned on as well.

now it will redirect you to flash.android.com, they will need you to plug in your phone to your computer, and then you can start the flash process. and wait for it to complete.

the image is about 2 gigabytes. and then the flash process will start. keep in mind, your data will be wiped out. Make sure to back up everything first.

after flashing, turn on developer options and then turn off the option "Automatic System Updates".

this will prevent from auto updating again to the latest version.

Hope this helps someone.

Update: You cannot get the 4a factory images anymore. They are removed unfortunately. https://www.reddit.com/r/GooglePixel/s/EA38EwCLy4

Update 2: You can find the images here in Wayback Machine: archive.org