How many powerbanks can i check in? Coz i'm planning to my about 20 pcs. For gifts this christmas.

Kristina, you can only take two at most. And the total capacity should be no more than 160wh. If the capacity is more than 100wh, you need to ask the permision from your airline. Moreover, you can't put them in the checked luggage. You need to bring them in your carry-on luggage.