While I haven't looked at how well embedded batteries are these days, I doubt most of them are soldered into phones--but it certainly wouldn't surprise me. They

While I haven't looked at how well embedded batteries are these days, I doubt most of them are soldered into phones--but it certainly wouldn't surprise me. They're certainly not serviceable or easy to remove, and replacing parts can mean a large amount of disassembly and hoping you don't break something. Compare this to my Pandigital novel 7, the first Android device I owned: the top half of the back slid up, and you could then unsnap the rest. The battery, internal storage, and other parts were immediately accessible and easy to replace. Admittedly, internal storage was easy because it was just a microsd card, but it made quadrupling the internal storage very easy. I played around with the insides multiple times until I killed it by breaking the socket for a ribbon connector. There was no need to remove glue, and iirc the adhesive was only sticky enough to stop things from sliding.