When I was at school ...
... we had this joke:
A man is at the airport catching a flight to Germany, when he meets his boss flying back from Japan. Hi Mike, says the boss, how are you? Mike has a few minutes before his flight, so he goes up to the boss for a chat. Putting down a couple of heavy suitcases the boss says, you gotta look at this, and shows Mike the most amazing watch he has ever seen. Got it in Tokyo airport, says the boss. It has a Z80 processor and 16MB of RAM [remember this joke is at least 30 years old], and if you press this ... a tiny aerial pops out and the color display starts showing BBC news.
Now Mike is a real gadget freak and is green with envy. But his boss is really nice, and says - look, Mike, I'm back in Tokyo next week. Why don't you have this, I'll grab another one? Mike is ecstatic; strapping the watch on he goes to his flight, which is now being called - only for his boss to say "wait a minute" - points at two massive suitcases - "don't you want the batteries?"
It is somewhat ironic that this joke predates mobile phones.