Today, Amazon has a pretty sweet deal on the RAVPower Element 10,400mAh external battery pack. It's available for just $23.99 right now with Free Shipping if you've got Amazon Prime shipping. 10400mAh of capacity. Charges all iPhone four to five times, a Galaxy S3 thrice, or an iPad / iPad 2 once. Android 5V / 3A (max) port charges Android devices and iPhone with iOS 5 or higher at full speed, iPad with iOS 5 or 6 at 1.5A, or iPad with iOS 7 at 1A; Apple 5V / 3A (max) port charges iPhone at full speed or iPad at 1A (Android devices at 0.5A). Note: this product CANNOT charge Samsung or Asus tablets. A lightweight, unassuming solution to life's daily power needs (8oz). LEDs display just how much juice you've got left. Reliable lithium polymer core ensures quality, supplying you with more than 500 charge cycles during the course of its life. Input: 5V / 1.5A; Use a 1.5A adapter (not included) for fastest charge times (8 hours).
RAVPower® Element 10400mAh External Battery USB Portable Charger (Dual USB Outputs, Ultra Compact Design), for iPhone 5, 5S, 5C, 4S, 4, iPad Air, 4, 3, 2, Mini 2 (Apple adapters not included); Samsung Galaxy S5, S4, S3, S2, Note 3, Note 2; HTC One, EVO, Thunderbolt, Incredible, Droid DNA, Motorola ATRIX, Droid, Moto X, Google Glass, Nexus 4, Nexus 5, Nexus 7, Nexus 10, LG Optimus, PS Vita, GoPro, Smart Watch and More – Black