Long Straight HairstyleecoonsJan 11, 10:43 PMElectromagnetic fields decrease with the cube of the distance (I think- might be square, but someone smarter than I can correct me). You would need to keep the charger within a few inches while charging. Frankly, if I'm going to carry a charger with me when I travel, I really don't care if it's plugged in directly or just has to be really close.