I can usually get through a three day on one set of rechargeables with mine. This past week though as I was taking them off they broke!! The plastic piece connecting the headband to the earpiece is pretty cheap plastic and it just snapped. I sent them back (DC is notoriously good with repairs/warranties) and they said they have been seeing this--just to let you know. I will have to wait about 2-3 weeks for my new ones. I would have gotten the Bose but they just aren't as comfortable on my ears as the X11. The noise cancelling is superior on the Bose though as one would expect.