As I had mentioned earlier when you first asked for ideas. Here's a drawing of the PowerGrip. Nothing is to scale in this drawing as I'm new at using this program and don't have AutoCad anymore.
There's a possibility to have a magnifying glass in a frame that fits into the console slot on the grip when not in use. The frame would have foldable left and right supports that could be snapped into mounting holes on each side of the console slot. I'm too tired to draw it at the moment.
Another cool option that could be added is a headphone jack near the USB ports.
The idea is that it can extend the device's battery life, add comfort and provide an option to play with a friend.