A little OT, but we flew SQ PER-SIN-FRA-ARN a few days ago and had to remove laptop and iPad at all security screening points along the way. In this electronic age, we of course now end up having to take multiple chargers for the various electronic devices, phones, cameras etc for both of us as well as our Belkin travel adaptor (double plugs with 2 x USB ports), so Mr Jurahn decided to use a thin hard shell case to carry all the chargers together in his hand luggage, so they'd be well protected from damage - we never put chargers in checked luggage in case our bags go MIA! Got through PER and SIN screening no problems, but came to a screeching halt at FRA when changing terminals. They didn't like the look of it at all, and we were held up at the screening point for some time - they said there were "too many" chargers - err, well, what are we supposed to do? It's not like we enjoy having to carry all the blasted things with us!
He hadn't taken the case out of his carry-on, as he hadn't needed to at the other airports, so maybe that was the issue. They finally let us go through, but we may have to split them up between us on the return trip as we have a VERY tight connection at FRA and the last thing we will need is being held up at screening again!