It was only mentioned in passing at the Google I/O developers conference, but Google announced the ability for smartphones running Android M with USB Type-C (Apple simply calls it USB-C) ports to recharge other smartphones. The potential here is enormous.
Your phone's battery can be used like an external battery pack for other devices. With a two-way USB Type-C cable, you could quickly "lend" a friend's dying smartphone some quick power. Smartwatches could also adopt USB Type-C ports instead of using proprietary wireless charging dock
Obviously, it wouldn't make much sense to us