If you own an iPhone 4 and find that you burn too quickly through its battery, you have a new battery expansion option from an old favourite. Mophie has announced the Juice Pack Air for iPhone 4. The redesigned extended-battery-slash-case offers a 1500 mAh battery (the iPhone 4’s built-in battery is 1420 mAh), which Mophie claims to add up to 6 hours of talk time on 3G, and up to 12 on EDGE, or an extra 36 hours of audio playback, or nine hours of video playback. It features a soft-touch black back and silver band around the sides, along with cut-out areas to expose the iPhone’s various buttons and headphone jack, and a four LED status indicator on the bottom (so you can see without pulling it out of a pocket). Its pass-through charging USB port allows you to sync with iTunes while charging either the iPhone’s internal battery or the pack’s extended battery.
TBA (3G model costs $119)