Man has bought a powerbank to charge phone on the go. He was using it for some time and he noticed that recharging going very slow – only 5% he was getting in an hour. He decided to look closer into the powerbank he got. What he saw is pretty awesome:
Technically it looks allright
Has controller and some stuff
Those are “batteries” with sand!
Probably the most expensive sand he bought in his whole life.
So beware of cheaply thingies little stores sell online.