I then shifted to lady?s bar which is narrower in diameter. Battery power still has a bearing on how stable the connection is, but I have gone 8+ hours without any problems. However, that being said, Im not about to complain. When people suggest the AKG K240s have weaknesses I suggest they do not, they are made for studio use to reveal weaknesses in the recording chain. I have read on the comments of people having faulty parts like a bolt being stripped or bent. They are so good! Its really in the middle of the pack. Whatever synthetic materials used to line these and the insole too, is made from creates a foul, lingering stench that forces me to keep these shoes out of my closet, my bedroom! Seriously awesome earbuds. I will definitely buy another one as our shoe collection expands.