I can personally attest to the merits of having a Power Delivery Usb C power bank.
I was on vacation for 2 weeks in Colombia and was not able to get a second and third battery before my departure. Fortunately I did find a somewhat inexpensive 20000mAh 45W PD battery back. It gave me about 3 recharges in a day, and when you are far away from a wall outlet this was beyond great to have. At about 100+ minutes to charge it left me plenty of time to plan my flights between recharges. Just need to be sure you have backup of cable, just in case. RUPPOLAR USB C Portable Charger on Amazon is the one I bought btw. I recommend it for everyone. It is pretty slow to charge the batterypack back to 100, so I would say connect it and leave it charging overnight.
Power delivery usb C battery pack = 100% yes