Charging your phone or tablet by placing it on a wireless charging mat is so old school. Fulton Innovation is developing technology that battery case for iphone 5 lets you use your tablets battery to charge your smartphone. Just place the two devices back to back and if youve got a full charge on your tablet you can use it to top off your phone.

Fulton wireless charging

You can also charge either device by using a standard wireless charger.

The system complies with the Qi wireless charging standard, which means you can use any Qi compatible charging equipment to provide a wireless charge to the phone or tablet but in addition to receiving a charge, the tablet in this prototype can also share its charge.

Fulton Innovation also plans to show off a charging pad thats capable of charging multiple devices at once during CES this week.