This piece of knowledge makes us feel powerful. It's as though someone out there, someone in the upper echelons of elite society, didn't want us to know about this. Well, how do you like that, ill-meaning stranger? Looks like we found out all about your special charging secret. Never again shall we cry in agony as we realize we forgot to bring a special outlet plug converter specifically made for one country.
Seriously, this may just save your phone's life at one point or another. It's an amazing little travel life hack that not a lot of people know about, which is a shame.