It seems to be magic because I lost count of the times I have charged my Beats X headphones with it and it still shows full battery on the red dot led display. For those who are unaware, heating problems not only can damage the internal parts, but they also reduce battery capacity over the long term. I got these just as the weather turned and need slippers that I could wear with socks. Inside the cushioning helps to make them feel cosy. maybe if they upgraded the sound and the Bluetooth quality as far not cutting off on me and static then yes I?m I?ll rate it 5 stars . Works on my recharging pad. Monday they were great. not weak, not pale, not mediocre-simply not there, absent, an apparition. vale la inversión! I like these a great deal.