12. How long does EH3 NC last and how long does it take to be fully charged?

A: EH3 NC uses 1000 mAh battery. At normal volume, pure Bluetooth mode lasts about 50 hours and Bluetooth noise reduction mode lasts about 30 hours.
3.5mm audio cable can be inserted as a wired headset when no electricity is available.
Charging time is about 2-3 hours.