ARCTIC Power Bank 2200 Ultra-Compact Backup Battery/Charger, 1.0A Output 2200mAh for Smartphones/MP3 - Black 1.0 Amp Output, 2200mAh Capacity Portable Backup Charger for Smart Phones/MP3 Supports Smart Phones by Apple, Samsung, Blackberry, Nokia, LG, HTC, Sony, Motorola & Others Sturdy Aluminum Compact Cylindrical Protective Casing Weighs only 2.8 oz LED Charge Indicator. Built-in Auto-Shutoff Safety Protection Circuitry 2-Year Limited Warranty