When it was revealed that Samsung was doing away with the removable battery on its flagship Galaxy S line, some fans were disappointed. However, it turns out Samsung's new Galaxy S6 and S6 Edge do have removable batteries after all... well sort of.
The battery is actually removable, as long as you're happy to deal with adhesive, a handful of tiny screws, removing the circuit board, and voiding the warranty.
The procedure is described as being "only for your service provider or an authorized service agent" and makes it crystal clear that if you break anything while carrying out the process yourself, you're on your own.
If past experience is anything to go by, removing that back cover is going to involve a heat gun (or a blow dryer), a suction cup, and guitar picks.
If you managed to get the back cover off without mangling it, then there are small screws for you to chew up while trying to remove them, circuit boards to fry, and ribbon cable connectors to break.
If you're used to taking handsets apart, this is a pretty straightforward operating. If you're not, then the manual gives you just enough information to be dangerous.