Anker Astro Slim3 6000mAh Ultra-Slim 2-Port Portable Charger External Battery Power Bank with Built-in Micro USB Cable for USB Devices (Black) Dual ports capable of supplying simultaneous, full-speed charges (1A each) to devices. Made with Grade A cells and premium microchips. Packs a punch: enough power for 3 charges or more on most phones, while compact design (0.47in) and matte surface allow for easy stacking during use. Micro USB hideaway cable reduces obstruction and the number of cords in your bag; USB output also available for iPhones or other USB-friendly devices. Charges via Micro-USB power wire (included) or AC adapter (not included). Input: 5V / 1A (5-6 hours to charge via 1A adapter); Output: USB 5V / 1A + 1A. Package contents: Astro? Slim3 External Battery Pack, micro USB cable, instruction manual.