RAVPower External Batteries: Travel Pack 2800mAh AC / Battery Charger / Power Bank $9 shipped, Element 10400mAh $26

Update (3/12 2:00pm): Get the RAVPower Element 10400mAh External Battery Pack for $25.49 with coupon code PB07SD01. Matches an all-time low. Rated 4.5 out of 5 stars. 

Amazon offers the RAVPower External Battery Pack 2800 mAh External Battery Charger / Power Bank / Flash Charger With Build-In AC Charger for $17.99 with free Prime shipping. Enter Coupon Code 2RDSJVSL at checkout knocks 50% off giving a final price of $8.99 shipped. Features:

• USB Port 5V/1A External Battery Charger with built-in foldable AC Chargers
• Charge Apple iPhone 5 1.4 full times, Charge Galaxy S3 1.4 full times
• 2800 mAh Capacity Top-Rated 2800 mAh polymer battery
• Compact and stylish, perfect for traveler
• Package Includes: 1*RP-PB10 power bank, 1* USB charging cable