I wanted to do it. I have ordered them used (as I always do when I only want to try something which I know I will not keep) and they arrived dead. Or I thought they were dead. I have later discovered that they have a removable battery and I remember to have seen a battery in the Box. In that moment I thought "ah, cool an extra battery". Somehow I never considered the possibility that these people could send the Headphone as default with the battery outside and with no clear instructions about this fact. So, they went back. Now I do not have much time and money to do that again. The Parrot Zik 2 are very complex, to really really review them, one needs lot of time to really learn how to use the app. I can't do that now, sorry.