How long is a piece of a string?
Having flown Lufthansa over 20 times this year alone and 100s of times in total here are my experiences.
If your carry on is large you risk a weighing more often.
If the flight is totally full you risk a weighing more often.
If you arrive late at check in you risk a weighing more often.
In reality if you are on time and ...
Yes. According to Carry-on baggage rules at Lufthansa
For a smooth boarding procedure, more stowage space on board and a
punctual departure, it is essential that your carry-on baggage
corresponds to the regulations. That is why we check your carry-on
baggage against the permitted dimensions, quantity and weight at
And from a ...
In my experience, it happens about in 10%-20% of my LH group flights (including Swiss and Austrian).
I have a pretty big roll aboard suitcase which probably triggers more attention than a smaller piece of carry on. In all cases, taking out a jacket or moving something heavy to my backpack did the trick, but I always make sure I'm not ...
If you can't find a UK->EU adaptor that will take a shaver plug (as in the top answer), you could also use a combination of a standard UK shaver -> UK Type G adapter, then a UK to EU adapter. This is slightly less safe than using one single adapter, but much better than trying to force something into the wrong socket.
As long as you travel within the EU (which for now still includes the UK), customs are not involved, the only thing they may check (and that's very very rare) are things that are actually illegal (drugs...) or where there are significant tax differences (cigarettes for instance). They will definitely not care about a laptop, accessories, or a graphics card.
They might, but you should not worry too much.
If it is weighted and goes over the limit and the check-in clerk does not let you "pass this time" you have other options.
You can swap items form carry-on luggage to checked-in luggage. You can leave the desk and check-in later with some items in your pockets, etc.
The best advice, however, is to check-in ...
The safest way without a doubt is getting an EU charger. Same with laptop chargers -- just swap the IEC C7 AC cable ("figure eight") or IEC C5 ("mickey mouse) for a cable appropriate the local power socket. It doesn't get safer than that. Avoid plug converters whenever you can.