USTOP&trade;Gold 2600mAh Square column shape Cell Phone Portable External Battery Power Bank Backup Charger Pack for iPhone 5, 4S, 4, 3GS, iPod, iPad, Mini; Samsung Galaxy Note & Tablets, S4, S3, S2, Nexus; HTC High Capacity, 2600mAh;Fit for your iPhone 4S / 4G / 3GS/Samsung Galaxy S4 / S3, Nokia and other smart phones; Compact, portable, Sleek, stylish and compact design; Easily fits into your bag to provide instant power; Perfect for trainroad trips, or whenever you need to charge your mobile devices wherever you are. High quality Lithium-ion battery ensures reliability; Input: DC 5V-600mAh,Output: DC 5V-800mAh; Charge the power bank via standard USB or AC adapter (not included).