Hahaha, that might be British-specific I guess? I always assumed it was universal. Just means “a long time”.

https://www.merriam-webster.com/dictionary/donkey's years

Why?

Do you have a reference for that? From all the documentation I’ve seen elsewhere, that’s not true. There’s no exclusion for waterproof devices, and everything has to be possible with tools a normal person can buy (you might need to go to a local hardware store, but no unique specialist expensive kit).

The full law is here: https://www.europarl.europa.eu/RegData/docs_autres_institutions/commission_europeenne/com/2020/0798/COM_COM(2020)0798_EN.pdf. It only mentions ‘water’ 3 times and none of them relate to waterproof phones (they’re talking about batteries of waterbourne transport & environmental impact of water use) so I don’t know where that’s coming from.

It’s totally possible to make waterproof phones with removable batteries - Samsung did it with the Galaxy S5 (IP67 - 1 meter under water for 30 minutes) way back in 2014 and there’s lots of other examples. It’s just not quite as cheap as glueing everything together.