That's definitely not a fake right there.

Two of this can power the half town. Now only for $15 ^^

How can this site still legally post ads?

They know that a freaking car battery has about half as that capacity?

If I had say, 5-10k to burn, I'd research the top 5-10 products on wish for a given category, stock some ahead of time, and then post to amazon to resell (so people don't have to wait for wish shipping or worry about being scammed).