iFixit, bless their hearts, have taken a Kindle Fire to pieces, though as it turns out, there aren't too many pieces to begin with. The battery is one huge unit, and all the processing and I/O occurs on a single PCB at the bottom of the device. Those expecting a carbon copy of the Playbook both outside and in will be disappointed: the layout, batteries, PCB, and all the components are different, making the form factor more or less the only real similarity between the two devices.source