I'm not sure if thats true. I would love the ability to be able to save battery by turning off my mobile. At the moment iPhones seem to drain power even when t

I'm not sure if thats true. I would love the ability to be able to save battery by turning off my mobile. At the moment iPhones seem to drain power even when they are "off" which makes me suspect that they aren't, in fact, actually fully powered off. There have been a few occasions when I have been without a charger for one reason or another, and would like to be able to fully power off my phone in order to save battery.