I buy these as a temporary replacement for a set of Motorola ROKR s305 headphone that die after 3 month . although I eventually receive a replacement set of the Motorolas , they remain in the box as these baby continue to out-perform they . they be not the best look headphone ever and they feel a bit cheap but they sound fine and the battery life be terrific . the Motorolas might last for 2-3 gym session before they die but these baby easily last for 20 session before I recharge they . and this be always because I worry they might be run low , not because they run out of juice . frankly for ~ $ 27 they be a steal .