Input ports  (x1):

• USB-C1 Input: 5V ⎓ 3A / 9V ⎓ 3A / 12V ⎓ 1.5A / 15V ⎓ 2A / 20V ⎓ 1.5A
• Total Input (PD)： 30W (20V ⎓ 1.5A ）

The above explanation means this powerbank can take only 30W input to recharge itself. Please make sure you are using a 30W PD wall charger to achieve better results. 

Such as the Anker 30W PD wall charger here: 

https://www.amazon.com/Anker-PowerDrive-Charger-Delivery-MacBook/dp/B07H4MWKTY

Recharging time: 

PD 30W wall charger can fully charge in only 4-4.5h  with the above-recommended wall charger.

If you have any questions, please contact us for further assistance.