In the past few years, we have seen a bunch of awesome battery cases for iPhone. The Hello ZEE iPhone case not only keeps your phone powered for longer, it also extends its memory space. It adds 32 GB of storage space to your iPhone 6s and iPhone 7. You will be able to move files from your / to your smartphone easily.
The 2600 mAh battery can be programmed to charge your phone when its battery goes below a certain level. The case also lets you charge your smartphone wirelessly.[where to get yours]