amazon offers RAVPower Deluxe 14000mAh
External Battery Charger/Portable Power Bank Pack for $35 + Free shipping.
Enter code HEV6B52F at checkout.
14000mAh high capacity battery pack for your mobile device.Get 7-8 charges on your iPhone 5, 4S and 3 charges on your Google Nexus,86% charges on your iPad 3/4.
Super-fast charge output (5V / 3A total) through dual USB ports (5V / 2A and 5V / 1A) allow for simultaneous charging of your iPad, iPhone, Android, and more at high speed.