Just got my Aurender Flow today. My unit came dead, so I had to charge it up before messing around with it. My unit didn't seem to charge, and if it did, it was really slow through my Macbook Pro. I looked it up and read on Aurenders product support page that it charges really slow when hooked up to a laptop and music is not playing. However, when you start playing music, the charging turns off. To top it off, my charger didn't work. Luckily I have a lot of Samsung ones, so that didn't matter to me. Also, Aurender recommends if you use another charger, use a 5A-2V charger. Hope this helps!