The charging LED beside the charging port turns red while charging, and turns to blue when the headset is fully charged. It takes about 2.5 hours to be completely charged. You can use the
SMH10R while it is charging. This is especially helpful when you use a cigarette charger for a long road trip.
You can charge the SMH10R on a helmet by connecting the supplied USB power & data cable or cigarette charger. You can use any standard micro-USB cable to charge the SMH10R.