I use the headset for approximately 1 year with an iPhone 4. In this period I have the headset only 2 or max. 3x charged, even though I use it almost daily when driving. The battery is sensational! The audio quality while driving is excellent, I hear my interlocutor crystal clear and without interference. Weakness, however, is the microphone: almost everyone says interlocutor that he bad because very quietly listen to me. And that is not because of my voice.
