Mophie has introduced its new Juice Pack for the second-generation iPod touch. Similar in design to the company’s prior Juice Packs for the iPhone and iPhone 3G, the iPod touch 2G models integrates a rechargeable lithium polymer battery into a soft grip case. According to the company, the Pack provides up to 42 hours of additional audio playback time, or up to seven additional hours of video playback. The Juice Pack also features a pass-through headphone jack and a USB port that can be used for both syncing and charging. Mophie’s Juice Pack for iPod touch 2G is available now and sells for $100.