Once the clips have been released, you can lift out the inner assembly (which has the hinge and lid attached).

The bottom plastic piece holds the battery and the charging coil and is very loosely clipped to the top, release it and carefully fold it to the side.

These clips break easily, but that shouldn't be a big problem, as the bottom piece will be held in place by the outer shell later.

Be careful to not rip off the wires of the battery or the charging coil, especially the charging coil wires are very fragile. If they break, you might need to resolder them.

If you're able to, you may want to desolder the copper charging coil wires now, which greatly reduces the chance of further damage. You'll need to resolder them when finished.