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Now let's charge that same battery - if we can - in 30 seconds, or 120th of the time. You'll need an 8.4kW charger to do that, which is going to be much larger and heavier than the laptop.
Not necessarily. If you only need to run it about 30 seconds at full blast, it doesn't have to have the size of a PSU designed to constantly deliver 8.4kW.
People are waaaaay too paranoid these days. There is nothing sacred about your name and address. No one can steal your identity with it. If the email had your SSN or DOB in it, that would be different. But your name and address? If you have a landline phone, it's probably in a phone book and on numerous telephone directory websites and has been for years. Public court records have your name and address too. Nobody cares.
Remember that the e-mail contains a lot of other information than just the name, address or telephone number. It gives it much more context than just picking some random contact from a phone book.
I'm also not sure if they are talking about a WiFi or cellular router. The transmit powers are very different.
The translated version says: The school was not equipped to test the effect of mobile phone radiation on them, but it was enough in fact very well. Therefore, the girls had to find an alternative. And the answer was karsefrø. Six trays seeds were put into a room without radiation, and six trays were put into another room next to two routers. Such a broadcast about the same type of radiation as an ordinary mobile.
"I think it is true for all _n. I was just playing it safe with _n >= 3 because I couldn't remember the proof." -- Baker, Pure Math 351a