Finally a promising looking product in this form factor. There have been a few very similar products on amazon, even with the handle, but with the usual bad reviews because of high failure rate and/or low quality cells. Lifepo4 is also really cool to see in this form factor, should be pretty durable compared to li-ion.
Article says it can charge a M2 Macbook Air 1.1 times over. The Macbook seems to have a 52.6w/h or 66.2w/h battery depending on 13 or 15" model and this article states that the powerbank has a 153w/h so it should be able to charge it well over 2x even with accounting for losses AND the larger 15" model battery. Not sure how you worked that out.