i have the magez car charger for my phone with the pitaka mag case also. the other day, when it was cold, it started to make a odd sound. it is whining when i place the phone on the charger. it starts to whine and chug and stops when i remove the phone. it will start again when i place the phone and when it gets warm it seems to stop. only just started to happen never happened before. even in cold weather.