I think you're right, however, 18650 batteries do carry, on average, more energy density per volume and weight.

> but the highest capacity 18650 out there is less than 15Wh and this advertises 77Wh.

10x 2000 mAh 18650 batteries in parallel gives you 20 Ah @ 3.7V.

> So, yeah, pot, kettle, all that.

Totally unnecessary comment but thanks.

> Totally unnecessary comment but thanks.

It's not more unnecessary than your comment about the OP article being poorly researched. If the conclusions are true, even if they didn't do the measurements themselves, I find it quite excusable to skip past the detailed specs of the battery.