Though we're not crazy about the idea of $100 iPhone battery packs, particularly given that there are some superb options for $40-60, we have to give Incase a lot of credit for developing something that seems like it might be worth some premium. The Power Slider Case for iPhone 3G ($100) combines the company's two-piece "Slider" case design with a battery pack, giving users a combination of iPhone body protection and spare power for use when traveling.…
