PowerCore Speed 20000 - model A1278 not fast charging

My power core speed 20000 powerbank does not quick charge my samsung s8+ anymore. I have tried changing the cable, I have made sure quick charge is enabled on the phone. It still won’t fast charge my phone. It has been less than 1 year i purchased it. What could be the issue? Thanks in advance

Please test the powerbank with other Quick Charge devices to see how it works. If the problem remains, please contact Anker Customer Support to process a warranty claim.

You’ve tried the cable already, good, that’s the most common reason.

Next would be reset everything.

Turn phone off, wait a while then on.

Get a USB cable and connect the output to input on the Powercore, press and hold power button for a few seconds.

Then try.

Support would like tell you this.

Once tried then it’s a warranty replacement most likely so you need order details and serial number (usually on the case and on the supplied cable).

Good luck. Anker’s support and warranty is excellent.