Parasitic cell phone

The days when you were unreachable are over! Now even after the phone battery has run out you can remain in contact with your friends and family!
Motorola has come up with that clever way keeping in contact even when their batteries have gone flat. The new system takes advantage of the fact the most modern phones can use Bluetooth for short range wireless links.

This cellphone patent from Motorola lets a cellphone keep an eye on its own battery power, and when the battery of the cell phone gets down to a certain point, the phone switches off all non-essential functions (like dialing and texting) and finds a compatible phone within Bluetooth range to use as a proxy, reports New Scientist.