Qi-Infinity&trade; Surface Pro 4 External Battery - 35,000 mAH Extended Pack for Windows Microsoft Tablet Surface Pro 1 2 3 4 & Surface Book - Includes 4 USB Ports, AC Adapter & Accessories in Bundle KEEP USING YOUR SURFACE PRO ANYWHERE - If you love using your Microsoft Surface Pro tablet but cant stand it running out of battery, this external battery pack is for you. Charge your Surface Pro 3, 4, Surface Book & other electronic devices on long flights, trains, road trips and more! FASTEST CHARGING FOR SURFACE PRO, PHONES & TABLETS - This external battery is specially designed with 12V and 15V DC output for the MS Windows Surface Pro 3, Pro 4, and Surface Book. It also features 3 USB ports that support 5V, 3A and 1 Quick Charging USB port 9V/12V for Samsung S7, S6, S6 Edge Plus, Note 5, and other mobile devices. It can also charge 5 devices simultaneously. INCLUDES AC ADAPTER ($65 VALUE), CABLES & ACCESSORIES - Dont worry about buying extra cables or accessories - this package has everything you need! When you order the Qi-infinity external battery pack bundle youll get an AC adapter ($65 value), one DC charging cable for the Surface Pro 3 & 4, and one USB-A - USB-C cable for Apple Macbook. SLEEK, PORTABLE & COMPACT - The Qi-infinity external power bank features a modern, stylish design that is compact for easy portability. The battery pack weighs only a little over a pound and measures 18.6 x 8.6 x 2.2 cm, making it easy to bring it with you wherever you go. HASSLE-FREE 12 MONTHS WARRANTY: Your satisfaction is our top priority, and all Qi-infinity products come with a 12-month replacement warranty from the date of purchase. This makes your order essentially risk-free!