I made them get a cigarette adaptor to USB charger (ie a cigarette adaptor with a USB plug in it). I was under the impression that if they plug their USB cable into this adaptor it should charge. For some reason it doesn't, which means they have to go and charge it from their laptop (a real PITA). Has anyone else come across this? If it can't be charged this way, how can one charge from a car, or can't you?