e designed a unique Smart Case for iPhone 6S to solve three fundamental challenges of iPhone Users; 1) Extend the memory so that you can save all the Pictures, Videos and Files and never run out of memory 2) Extend a full day of battery power, especially when you are travelling 3) Design a Case which is Slim and convenient to use. The Smart Case has Built-in 16GB Memory, and with "iPowerCase App" you can save or transfer all of your Videos, Photos, Files and never run of memory. With Additional 16GB you can save up to estimated 7500 new photos/Files or 1500 new songs. The Smart Case has Built-in 2400 mAh high Energy density battery Cell ( 650 Wh/L) for a quick recharge of your iPhone when you need it most. With 2400 mAH additional battery you can have 8 hours of extra talk time or 7 Hours of Video Play or 6 Hours of WiFi/4G Connection. You can download the iPowerCaseApp for iPhone from apple store to manage all of your Photos, Videos, Music and documents. With Built-in Dual IC Chips we can simultaneously charge the Smart Case & iPhone Battery. Dual Separate IC Chips largely improves the speed of charging and discharging. You can use your existing Lightning cable and charger to charge the Smart Case. KN1 processor, customized and developed on the basis of ARM Cortex- M3 framework, has an industry- leading lower power consumption and higher energy efficiency ratio. In-Built 9 level of multi-protection technology, and a new ESD circuit for improved static protection mechanism.