Btw if ur owner of Pixel 7a and you think your battery is faulty (aka starts to drain battery at around ~30% that seems to be the most common, but also bulging etc.) Go to support.google.com/pixelphone/answer/16043453 (or search for it if you don't wanna trust me with a link, I get it lol)
You might be eligible to either free repair or compensation, even without warranty.