There are better options out there. I recently bought the INIU 10,000mAh 22.5W powerbank from Amazon for $29.69 CAD [0].

It weighs 205g/7.2oz.

[0]: https://www.amazon.ca/dp/B09176JCKZ

I like INIU, but this has half the Wh? 10Ah @ 205g vs 20Ah @ 280g.