Quote Originally Posted by Steve 0080 View Post
Can I cut off the cigarette lighter plug and add a USB plug to charge this unit?

I think there are 4 wires in the USB...2 data, One + one -, or one 5 volt and one 12 volt. Does anyone know which wire and how this could be done ?
If possible please post wiring schematic .
Negative, 4 wires, 2 data, uno groundo and eins +funf volts. Can you check that cig plug in your car with voltmeter to see if it dropping the voltage from 12 to 5? On the Sena website it says there is a USB charge and data capability on that Freewire.