ARUN 2300mAh External Backup Battery Portable Power Bank For iPhone 5 5C 5S, SAMSUNG NOTE 2 3, GALAXY S2 S3 S4, KINDLE, TOUCHPAD, TABLET, iPad Air Mini (WHITE) 4-LED indicators display the current available power capacity (25%, 50%, 75%, 100%) Great to bring on trips due to its portable size. Due to the ARUN 2300mAh External Backup Battery Power Bank stylish, energy efficient, and practical design, users are able to easily pack them away in their luggage, backpacks, briefcases, pockets, etc., on the go and have access to the Power Bank any time they need a recharge for their electronic devices Output: 5V, 1.0A (max). MicroUSB Cable Included. Power Adapter is not included. The high capacity ARUN 2300mAh External Backup Battery Power Bank allows you to charge your Apple iPhones, Samsung Galaxy S4 and other previous Galaxy, Nexus 4, HTC One, Sony Xperia, and other recent smartphones up to multiple times (depending on your device's battery capacity) before requiring a recharge of the Power Bank. It will also be able to charge most recent tablets devices to an optimal/usable point, near full, or even to its fully charged capacity (depending on your device's battery capacity). Built-in Smart On/Off Design automatically charges your device(s) when plugged in and shuts off when it's done, to prevent overcharging. This will lower the possibility of damaging your electronic devices because of this built-in failsafe design. The Built-in Smart On/Off Design also allows the Power Bank device to efficiently preserve its battery capacity as none of it will be wasted, since the Power Bank device will recognize that the electronic devices being charged are at its full capacity; in turn, the Power Bank will safely power itself off.