How long does it take to charge the M100?

It takes up to approximately 150 minutes to charge the M100 ear buds from 0% to 100%.

The M100 charging case is also able to fast charge the ear buds, 10 minutes of charging will give up to 4 hours of playback on the M100 with Noise Cancelling disabled, and up to 2 hours of playback with Noise Cancelling enabled.