As the topic headline asks. I was just wondering with my limited knowledge of how the iPhone's conductive touch sensitivity works, if touching the screen while in sleep mode and completing the circuit in any way can affect the battery life of your phone. Or does the screen have to be activated for sure to complete the circuit, which is what I would think. And how about leaving the phone in your pocket with the screen facing your body? Such close proximity to your skin through such a thin material like the ones used to makes pockets definitely completes the circuit. Just wondering if anyone with some electrical engineering or actual iPhone engineering knowledge knows anything about this.