2.4A OUTPUT AND 2.1A INPUT: 2.1A input can be 2 times faster to fully charge the 10200mAh portable charger ( please use a 2A or higher output charger); 2.4A output makes it charge other devices 2X faster than other chargers. The maximum input and output for the fastest and strongest charging experience.</br>EXCLUSIVE SMARTFIT TECHNOLOGY: With the Dual USB Port up to 2.1A Max with per port it Charge 2 times faster and smarter than others automatically detects and delivers the optimal charging current for any connected device- ensuring the fastest and most efficient charge.</br>ADVANCED POWER BANK: Panasonic grade A Li-ion polymer cell and premium microchips create high-quality portable charger; Premium aluminum case; Secured battery safety with 4 layers of smart safety protection circuit; Advanced power lock.</br>UNIQUE LED DESIGN: Smooth aluminum shell allows you to power up in style while 3 status LEDs keep you informed of remaining capacity. Built-in flashlight for dark or low-light environments.</br>PACKAGE CONTENT: Jackery Fit External Battery*1 premium Micro USB cable*1 User Guide*1 18 month warranty card*1</br></br>Product Description</br></br><b>Jackery? Fit</b><br> The most fit portable external battery with 2.4A output designed to extend mobile device's battery life. With Panasonic Cell and Aluminum Shell It features high-energy density fast charging speed?? compact design?? and smart safety protection circuit?? making it the most reliable on-the-go <br><br> <b>Superior Quality</b><br> The Jackery battery charger takes everything that advances it to a new level. They are made with Panasonic Grade A Lithium-ion battery cells?? aluminum metal case?? and premium microchips?? together with 4 layers of smart safety protection circuits?? recharging more than 500 times over the life of the battery.<br><br> <b>Popular Compatible Devices</b><br> Apple: iPhone SE 6 6Plus 5S 5C 5 4S 4 Air Mini iPod (Apple cable required)<br> Samsung: Galaxy S7 S6 S5 S4 Note 4 3 2<br> Others: Nexus / HTC One / Motorola Moto X / LG / Nokia Lumia / Most of Android Phones / Android Tablets / Google Glass / Blackberry / Sony Xperia / PSP / GoPro<br><br> <b>Specification:</b><br> Performance for iPhones: 300%-500% battery life<br> Input: 5V/2.1A<br> Input charging time: 4-8