Hacker News Reader

I don't think this power bank uses 18650. You could fit 3 18650 in it, but the highest capacity 18650 out there is less than 15Wh and this advertises 77Wh. Even the tested capacity of 55Wh is higher than the before-loss 18650 capacity you could fit in it.

> This is a very poorly researched article

So, yeah, pot, kettle, all that.

View on HN

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.

yea considering they made 6 bullet points all just to say "rated and tested capacities are usually different" reeked of pedantry (although not surprising as we are on a tech site) and IMO did not warrant the label of "very poorly researched article"

Reply on news.ycombinator.com