NOTE: Removing the top cover does not void your device warranty.
1. Using a flat-head screwdriver pry off the rubber bumpers which conceal the screws (hardware v1.0 only, since v1.1 does not have these bumpers):
2. Using a phillips screwdriver, undo the 4 screws:
3. Separate the top cover from the device. Be careful not to lose the 2x small button caps that may fall out.