Use these for running connect to my apple watch and battery easily lasts max i have used is 2 hrs but advertised as 4 so they have never run out for me compared to some of the big brands these are amazingly cheap but they feel solid and the sound is fine for what i need volume doesnt go too high which might not suit some but the noise cancelling is excellent and i feel nicely cocooned in my head when out on the street also drives the wife mad as i cant hear her speaking to me when they are in