Yubi Power Ultra-portable Mini 2600mah Universal External Battery Power Bank for All Smartphones & Usb-charged Devices (Apple Iphone, Ipad, Ipod, Adroid, Samsung, Htc, Android, & Kindle) Oak Wood Fully charge your iPhone with 8 hours or more of additional talk time. Stylish & compact design fits effortlessly into your pocket or hand bag. Made with premium quality circuitry & 2600mAh, Samsung Grade A cells to ensure life-time safety and reliability. Built in electric circuit protection: protects from over-charge, over-current, over-discharge, & short-circuiting. Charge time: 3-4 hours via USB 1A adapter. (not included)