Email response from Anker:
“As our team is arranging a testing for these two items now, in order to save you time, would you please advise if you would like to take another Anker PD wall charger to charge the PowerCore 10000 PD? It is also a new item which is a 30W PD wall charger with one more USB output port on it. Here is the product link for your reference.
If you would like to take it for a try, we can help you with an exchange of the 18W Anker PD wall charger you have and no additional cost will be charged on the price difference(a prepaid shipping label will be sent to you to return it for an exchange). Please let me know how do you think.”