PowerSkin has rolled out its new Gaming Skin battery case for the iPhone and iPod touch. The Gaming Skin offers an integrated 2050 mAh battery—good for up to 10 hours of extra game play, according to the company—built-in stereo speakers, LED battery status lights, a vibration motor for game enhancement, a pass-through headphone port, external volume up and down buttons, and a USB to allow for syncing and charging of the device while in…