The Oomph Value 2,000 mAh Power Bank has a rechargeable lithium ion Grade A battery (7.4Wh) with enough power to charge smartphones, MP3 players and more. The reusable power bank charges via USB cable (included), which can be used to recharge the battery backup or other devices with a Micro-USB input, such as Android smartphones (Samsung, Motorola, HTC, Nokia and others). Input 5V800mA. Output 5V1000mA. Power banks are permitted in carry-on luggage only, and at the discretion of TSA agents.