Yes, it annoys me a lot too. Previously, I had a laptop in which it was easy to change the battery and its operating time increased to several days. Now I have a tablet and I have to carry a power bank with me. In principle, I found only such a solution.

BUT most likely, non-removable batteries are made so that you can follow any person, as long as you have not removed the battery from the device, you can track your location and even in some cases listen to what you are saying