I dont own the playbook, but for my friend it Worked.Sorry for the OT, but does this really work on the Playbook? I know that there are more than several instances of it working for many users on Crackberry, but has it personally worked for you? I'm asking this because my brother's Playbook recently died and I tried stack charging it for over an hour and then simply gave up.
Just charge it for 15 min, remove, then after 5 min keep it for charging. Do so for 2-3 hrs and it should start!