Question about Aukey Pb-Y3

This is not entirely correct. According to the SWISS baggage rules: "Spare batteries for portable electronic devices / rechargeable battery (powerbank):
All spare batteries are only allowed in hand luggage.
Batteries with 100 Wh to 160 Wh power, maximum 2 pieces and only after advance notification.
Batteries over 160 Wh generally prohibited"

So this battery pack with 150 Wh is still ok within the permitted range. I see it as a matter for the customer (i.e. myself) to clarify this. Otherwise, it would have to be noted for every electronic item with a battery that it may not be transported in checked-in luggage.

Believe me, a lot of people don't know that. And not every power bank has the number of watt-hours or the internal voltage on it. I would find it very helpful if, for example, it were visibly indicated somewhere here in the shop.

Thank you very much for the tip, I would not have thought of it now.