The world"s smallest external rechargeable battery with 2.1A output for fast charging; Fits easily into any bag or pocket; Compact Size: 3.8 x 1.8 x 0.9 inches; Weight: 5.4 ounces; Output: USB DC 5V 2.1A; Compact, portable & stylish design; Easily fits into your bag to provide instant power; PERFECT for long plane flights, road trips, or whenever you need to charge your mobile devices wherever you are. * High Capacity, 5600mAh rechargeable power capacity with 2.1A output. Add 22 hours of talk time or 2-3 full charges to your iPhone 5 / 4 / 4S / 3G / 3GS; 1-2 charges for Samsung Galaxy S4, S3, 200+ hours audio playback, or 200% - 300% to the battery life of most mobile phones. * Samsung Grade A cell and premium microchips ensure high quality; Premium aluminum case; Secured battery safety with 4 layers of smart safety protection circuit; Advanced power lock technology with standby time up to 6 months after fully charged. 500+ recharge cycles over the life of the battery. * Convenient flashlight updated to prevent accidental activation: lights only after pressing the power button twice; 3 LED status of charge indicators to indicate the charging and discharging process. * Package includes: 1 Jackery Bar External Battery, 1 premium Micro USB to USB 2.0 cable； Visit www.jackeryusa.com for more details