Smok Alien 220w not charging using power bank??

[stratus.vaping]

It's a horrible practice to charge your mod with powerbank. DON'T EVER DO THAT.
Countless customers here killed their mods because of that.
Unless you buy a powerbank from a really reputable brand, then it's kind of a go. Otherwise, don't do that.
mods use really basic ancient grade circuitry, which aren't reliable enough to deal with all kinds of abuse (overcurrent, overvoltage, temperature), even if they are promoting this as standout feature.
Manufacturers, which care enough about customers, don't even allow to charge mods with powerbanks. (electricity delivery is different, that's why mods don't recognize any charge when plugged in. It's a really technical thing, won't go into detail too much)

Agree to a degree, I should have added- never charge a cell in a mod, but internal cells are a problem when on the trail or off the grid ( I am often). Many quality cell chargers use USB DC input, so using them with a powerbank covers all those potential issues. Done it myself many times 8)

Having stripped down one or two recent mods ( samples that were faulty somehow) and having an electronics engineering background I can say that those of recent manufacture from quality producers do have good protection circuitry, well designed and implemented.

Smok are amongst those I wouldn't touch with a barge pole.