This has nothing to do with the cell phone, nut with the charger. Even if the phone stops drawing current, old-style transformer based chargers still draw power

This has nothing to do with the cell phone, nut with the charger. Even if the phone stops drawing current, old-style transformer based chargers still draw power from the grid. Newer switching power supplies do not - at all, as the link above [1] showed. [1] http://www.inference.phy.cam.ac.uk/sustainable/charger/ http://www.inference.phy.cam.ac.uk/sustainable/charger/