Gently pry the back away from the volume buttons just enough to insert a wedge or guitar pick below the volume buttons to take any stress off the buttons. (they are loose and can ruin the switches inside) Work your way carefully around the back, without inserting your pry tool in too far.

End near the speakers, they are attached to the back and wired directly to the board. Lift the back up and over from the bottom and pry the speakers from their holes; they are stuck in place around the edges with foam tape. The wires run along under the battery, so just leave them for now.