This product has worked great for a while. Maybe about a month or so. I used a 2A power bank plugged into the wall and was able to charge all 4 devices at the same time. One fine day the charger stopped charging constantly. It will be "pulse" charging like our phones sometimes do when the end of the cord is bent. Unfortunately this comes back and I have to bite the bullet and just buy genuine used Sony chargers on eBay. :(