Hi - everyone has been so helpful to me with my questions, so I thought I'd post a warning for those of us (meaning at least me!) who don't know that leaving SOME car chargers plugged in overnight can drain your car battery. I had been using a USB A to USB micro based charger, which did not affect the car battery, but I bought the Motorola car dock yesterday and started using the Motorola OEM car charger. This is the one that emits a cool blue light near the plug-in. I left it plugged in, and this morning for the first time in over 10 years, my battery is stone cold dead. So, if you use a car charger (and who doesn't), make sure you unplug it from the car outlet when you turn off your car! I talked to a mechanic and he said that some drain the battery, some don't. Unless you want to risk being stranded - unplug it!!!