As I understand it, a charge cycle constitutes a full 0 to 100 charge of the battery. Hence, if you charge your iPhone at 50% power, it counts as half of a charge cycle. So assuming I use 50% of the battery per day, the iPhone battery will last me two years. Seems consistent with other rechargeable devices, and I'll probably upgrade to iPhone v2 before then anyway. Anyway, my question is this. If I leave my iPhone connected and charging on a wall outlet, when I'm at work/home/etc, does this reduce the longevity of the battery (i.e. somehow constitute as a charge cycle)?