iPhone Gamepad - Logitech Powershell Review
Logitech Powershell review - Well known accessory maker Logitech's first stab at an official gamepad, made for iPhone and iPod Touch, now that iOS7 has built in gaming controller support
"A combination mobile game controller and second battery, Logitech's PowerShell Controller + Battery for iPhone 5 and iPod touch 5th generation lets you play and talk and surf for hours without draining your iPhone or iPod battery. Console-style analogue game controls are iOS 7 controller compatible, allowing for more intensive, complex game play with an entire screen for viewing. A 1500 mAh battery provides plenty of power for long game sessions."
http://gaming.logitech.com/en-au/product/powershell-controller-and-battery
Works with iPhone 5, iPhone 5s or iPod touch (5th generation)
Technical Specifications
Length: 200mmWidth: 63mmDepth: 21mmWeight: 120gBattery capacity: 1500 mAh