I ordered this external battery there a while, I did open yesterday and so I loaded. Everything went normally until then. Today, out of power, and thinking he had to overcome the external, I try to use it. And there surprises, battery charge my phone for 10 seconds and cut. As for the tablet! Really handicapping when it does not wait! Nevertheless, thank you Amazon for support responsiveness on this point is impeccable.
EDIT: Having been contacted, thank you for the very quick response shop, the kindness of their customer service and responsiveness. I was exchanging the battery and everything works now!