My car charger can boil water really fast [video]

In Finland we do it every day and have done decades already.

Those who may not know electric stoves have been about fifty years common use at least in urban environments. Stoves have anything from three, one in each of three phase current used heating elements (resistor coils) 400V 6-8 kW power draw commonly in small house stoves and 2-3 times that swimming baths saunas stoves.

While sitting topmost sauna benches bathing, we throw fresh water from bucket with a sauna laddle (saunakauha) water to stove(s) anything from small drippings to a pint with trying to little spread it out. This is to get steam and make it pleasant relaxing 'löyly' as we call it.

The stove is usually heated about an hour or so before starting bathing to get temperature somewhere 70°-100°C (158-212°F).

It's not advisable to have stove showing those red hot glowing elements peeking out behind stones, but it does happen if stones were not laid properly. But even if water gets directly to elements those will not break or get any damage as they are made intentionally to resist that.

So boiling water practically immediately does happen, it's not particularly dangerous when applied in circumstances where equipment is made to withstand that is nothing miraculous. And that really happens millions of times each day in Finland and some other places where that kind of sauna culture is practised both at people private homes and also public swimming baths saunas alike.

I will be observing it next time about in 14 hours from this writing as I'm going swimming as usual tomorrow morning at 6:00 am. when pool opens early tomorrow, and then likewise twice more (Wed, Fri). Also once more (Thu) evening sauna reservation slot i've got this flat I live.

There is a quite good english page about Finish sauna in Wikipedia, but to get a glimpse what modern sauna and stoves look Harvia a long time stove manufacturer web pages you get some sense what I'm writing about.

- https://www.harvia.com/en/

Are you perhaps conflating it with the EU regulations on vacuum cleaners going in around 2017? As with all EU regulations, this of course resulted in a decent bunch of EU-bashing in UK media by the usual suspects - despite less-power-hungry vacuum cleaners being just as effective as the more power-hungry ones, and power consumption being inflated by manufacturers to market their vacuums, as plenty of people believed that "bigger number = more suck = more better".

> limited by the battery's rated number of cycles

Obviously the battery should be replaceable. (It should be in most electronics, really...)

> The battery's proximity to the heat source wouldn't help.

That doesn't seem like a particularly tricky problem to me. The standard kettle already tries as hard as possible to insulate the heat. If you were really worried it'd be possible to put the battery on a separate power brick instead probably.

...

And I guess I could've solved my own problem by googling it. There are tons of battery kettles on the market, including a 1500W one by Cuisinart and a 2200W (apparently?) unit by Makita. The latter is predictably expensive but the Cuisinart is available for around $100 where I live, which is definitely pricey but seems plausible.

Given that premium kettles already sell for about $100, there's definitely room for an ultra premium kettle that boils water laughably fast for $150.