Amazon offers the ALLPOWERS 15600mAh 2-Port Portable Power Bank for a low $12.54 after Coupon Code: "E4A3ODCC" plus FREE shipping on orders above $49 or with Amazon Prime. Limited time offer.

You save $27.45 off the price! This has a 4.1 out of 5 star rating with over 570 reviews.

• 2x USB ports (Output 1: 5V/1A, Output 2: 5V/2.4A)
• LED lights keep you informed of remaining capacity
• Premium LG cells and cutting-edge circuitry with over 500 battery charge cycles
• Automatically shutdown if a short circuit or overload occurred while unit is charging
• Includes micro USB data cable