If these were $10 payless shoes, I wouldn?t complain, but these typically run 4 times that. This review is already way too long. I dont know how long the battery life actually is but that is because Ive never had them die on me. I ll take a chance with them hoping they will losen up once I wear them for a while. Cómodos y prácticos, de calidad. I am a very fidgety person so this doesnt really have much to do with the earbuds themselves. 5?s are fine-used a shoe horn to get them on and they fit fine! My husband helped me get that on. This product works perfectly for storing my wine bottles, sturdy, well made, looks great! 5 mm cmmx cable from sennheiser too!