POCKETABLE AND VERSATILE: The thinnest and lightest 10000 mAh portable battery pack on the market only 6.2 oz and 40% thinner than most 10000 mAh power banks. Perfect for your pocket or bag. Thoughtful anti-slip surface ensures a secure grip. Charges tablets, phones, connected watches, Bluetooth earphones and Fitbit via three modes: high-speed (Quick Charge 2.0), normal, and small-current. Dual input interface fast rechargeable via either Micro USB or USB-C port. SUPERIOR ENERGY DENSITY AND EFFICIENCY: Uses premium battery cells with energy density as high as 664Wh/L, and delivers the same charging capacity while weighing 10% less than similar products on the market. Leverages Zimis proprietary power management IC technology custom designed to seamlessly integrate with the premium battery components onboard and maximize their energy conversion efficiency. GUARANTEED SAFETY: Premium components and circuitry for the finest quality and safety. FCC, USTC, CEC, and RoHS certified. We have cumulatively shipped over sixty million portable chargers/power banks worldwide since 2014. We stand behind our products and will make every effort to ensure that your product purchasing and ownership experience a very pleasant one. COMPATIBILITY: Intelligently detects your device type to deliver fastest charge possible. Works with iPhone 7 · 7 Plus · 6 · 6 Plus · 6S · 6S Plus · 5 · 5C · 5S · 4 · 4S, iPad 2 · 3 · 4 · Air · Air 2 · 2017 · Mini 2 · 3 · 4, Samsung Galaxy S8 · S8+ · S7 · S7 Edge · S6 · S6 Edge · S5 · S4, Galaxy Note, Google Nexus, Kindle Fire HD/HDX, LG, Fitbit, BT earphones and more. FOR IPHONE/IPAD: Its normal that the blue indicator wont light rest assured that charging is at max speed allowed by Apple. WHAT’S IN THE BOX: one PowerPack portable charger, Micro USB to USB-A charge cable, user guide, 18-month limited warranty, and lifetime technical support.