the combination of the 4000mah battery and the super mario brothers fast charging have removed all battery woes. No blisters, they just felt tired, which is not what I would expect with this type of shoe. Hopefully they make these forever As far as the brush awesome! Sound quality is very good (full and rich), and the gesture navigation skip forward and back worked for me as well, boom! Its super snug and I love the addition to my home. That said, the MT8?s are the best judged and most useful studio headphones I?ve ever used. Cable length is good for a laptop but stretching to a desktop may be tight. He had been given different medicines to slow down the cancer but the outlook doesnt look good. The size 11M normally has some wiggle room in them.