I don't think most batteries in smartphones are intended for replacement. For example, here is the process for a Google Pixel 3a: https://www.ifixit.com/Guide/G

I don't think most batteries in smartphones are intended for replacement. For example, here is the process for a Google Pixel 3a: https://www.ifixit.com/Guide/Google+Pixel+3a+Battery+Replacement/124322 https://www.ifixit.com/Guide/Google+Pixel+3a+Battery+Replace... Now, can it be replaced? Yes. Is it intended to be within the skillset of the average consumer? Clearly not.