[daniper]

Yes, apps (like Facebook's) which are drawing lots of current in the background is part of it -- but the point of our team's hacking into the iPhone was to find out what else really affects your phone's battery. It's not just background apps updating.

Nothing we discovered in the lab is 'revolutionary' -- everyone knows your battery gets used up more when the screen is brighter, and when your phone is trying to find a tower or router to connect to, but we just wanted to put some numbers behind it.

Hope it was useful; we had fun breaking open an iPhone regardless ;-)