How would the airline know what you put in the tray at security, for checking by airport security staff?! These controls are not carried out by the airline, and they apply in the same way irrespective of which airline passengers will be using.
While it seems a bit ridiculous to me to carry around (anywhere) 4 phones and a tablet, if you insist on travelling with these, then they actually HAVE to go in your hand-luggage, as most (if not all) airlines DO ban items containing lithium-ion batteries from being packed in checked baggage. Therefore, there is no problem with airport security, because IF you have these items, they SHOULD be in your hand-luggage, and going in the cabin with you, not in the hold.
If you did have a problem at security, e.g. if you had a pen-knife or excess liquids, you wouldn't get fined: the prohibited item(s) would be confiscated.
Edited: 6 years ago