Mophie has introduced its new Juice Pack battery extender for iPod touch. Like the company’s previous Juice Pack for iPhone, the Juice Pack for iPod touch houses a rechargeable lithium polymer battery within a black soft-touch case that attaches to the touch’s Dock Connector and headphone jack and covers the device’s bottom and most of its back. The battery provides up to seven additional hours of video playback and 30 hours of…