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New Trent iCurve Dual Charger
One of the major drawbacks of relying on portable devices like the iPhone or iPad is that you're totally reliant on the built-in battery. Once that hits empty, you're done for the day. Fortunately, there are portable battery packs that allow you to keep your iPhone and iPad topped up throughout the day so they're always ready for action.
One such portable battery pack is the New Trent iCurve Dual Charger. This offers 7,000 mAh of power and it compatible with both the iPhone 4S and the new iPad 3 (as well as any other device that can be charged from a USB port … as long as you have the appropriate cable). It's fitted with two USB ports so you can charge two devices simultaneously.
Image credit: New Trent