USTOP&trade;Green 2600mAh Square column shape Portable External Battery Power Bank Backup Charger for iPhone 5, 4S, 4, Galaxy Nexus, Blackberry, HTC, LG, Motorola,Nokia iPod Touch / Samsung Galaxy S3 S S2 S II 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).