Amazon offers the RAVPower 2800mAh External Battery Charger with Built-in Wall Charger for $24.99. Code T5TZQC3B drops the price to $12.49 shipped with Prime or on orders over $35. That’s the lowest price we’ve seen on this Powerpack which can add over a full charge to an iPhone or similar USB powered device or hours and hours to iPads and tablets. It can also function as your day to day outlet charger. 

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