Thank you for bringing this issue to our attention via the community. And thanks for all the helpful replies from the rest.
We regret to see you were having problems with the PowerCore Speed 10000mAh battery to charge your Galaxy J5 and have the issue being fixed now. It is correct that use another charging cable to charge your phone and see if the problem repeats. Rest assured that we at Anker always take the full responsibility for the function of our products according to the 18-month warranty.
You are always welcome to contact us via email@example.com in case you need any further assistance in the future.