Protection, storage, battery life — SanDisk’s iXPAND Memory Case is a three in one package. Designed for the iPhone 6/6s this case can hold 32, 64 or 128GB of extra storage. Plus, you can add on an optional 1900mAh battery pack to extend the life of your phone. The case’s free companion app, Memory Case, allows you to view and manage what you have stored in the case’s storage and also view battery life stats and settings. There’s a power button and LED indicators for battery life so you can use the battery without the app if you wish, and it charges with a micro-USB cable.