Let’s be honest, the iPhone's battery is less than impressive. Users can very quickly run out of juice, but the kind people at Mophie can help solve this problem. The Mophie Juice Pack for iPhone 3G and 3GS models is a rechargeable lithium polymer battery in the form of a non-slip, soft grip case. It extends your talk time by about six hours on 3G or 12 hours on 2G. It also gives you an extra seven hours of browsing time on Wi-Fi. You can charge both the case battery and your iPhone’s battery but you'll need to buy a cable that’s sold separately. The case is yours for $110.