Looks like the bad guys have another way to try and get explosives on a plane,

"If you forgot to charge your phone before leaving for a US-bound flight, you may just find your device confiscated by security from now onwards.

The US Transportation Security Administration (TSA) has announced enhanced security measures at “certain” overseas airports for flights into the US. Travelers will be asked to turn on their devices including mobile phones, and those without power will be banned from the flight."