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Get this iGo Charge Anywhere Portable Battery Pack for $14.99 at Woot. Shipping is $5. This is the lowest price we found by $8. It's a 1700 mAh battery with USB and microUSB ports and it has a pull out plug to you can charge it directly from an outlet. Plus, it ships with an Apple 30-pin connector cable for iPhones up to the 4S and earlier model iPods and iPads. Sales tax is not charged in most states.