Mophie has outed its new Juice Pack Plus battery case for the iPhone 4. Like the prior Juice Pack Air for iPhone 4, the Plus integrates a rechargeable battery—2000 mAh—into a two-piece, slide-on case with open access to the headphone port, cameras + flash, volume buttons, ring/silent switch, and sleep/wake buttons. Mophie claims the new Juice Pack Plus offers up to eight hours of additional talk time over 3G, up to seven hours of 3G data use, up to 44 extra hours of audio playback, or up to 11 hours of extended video playback on a single charge. Other features include a standby/charging switch, integrated LED status indicator, acoustic sound enhancement, and a micro USB port for charging and syncing. The Mophie Juice Pack Plus for the iPhone 4 is available now and sells for $100.