If you're willing to compromise on your thicker battery, you can just get a case.
My pixel 9 is essentially flat, and the battery life is plenty for a couple of days.
My pixel 9 is essentially flat, and the battery life is plenty for a couple of days.
Either way, my point is that with a case the pixel 9 is mostly flat, and has a battery life that I can't complain about. How big the battery is physically is unimportant to me. Logically it's big enough.