Working external battery pack?

Hi. Im in India and unable to find a decent 45w power bank thats reasonably priced. Shipping from any other country is ruled out since the pandemic. Can anyone point me towards a good power bank which i can buy in India?

Can you send link “ where to buy”? thank you.

SOLVED! After hunting through a ton of power banks on amazon I decided to try the one I have linked below and am very happy to report that it seems to work perfectly. When plugged in the projector acts just as if it were plugged into the wall.

NUCLEUS 26,800 mAh Power Bank, OTG Technologies, with 100 watt Power Delivery & Quick Charge 3.0 Technology. Power your Laptop, Mobile phone and MP3 player On The Go; Compatible with Nintendo Switch.
by Innov8 Communications Ltd

I’ve just bought this one. Seems to be working fine.

I have a simple powerbank from liddl with usbc pd up to 15 v and that is working. Maybe the mentioned powerbank has 5v, 12v and 20v but not 15v…