USTOP&trade;Blue 2600mAh Square column shape External Battery Backup Charger for iPhone 5,4S, 4, iPad 4, 3, 2, Mini, iPods, Samsung Galaxy S4, S3, S2,Thunderbolt, Incredible, Droid DNA, Motorola ATRIX, Droid, Google Glass, Nexus 4, Nexus 7, Nexus 10 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).