Or it is original but made for cheap in China while being sold at 10x the price.

That’s not true at all, China makes both high quality and incredibly cheep at the same time. Look at brands like Anker, Ecoflow, Hisense, Xiaomi, Dji, Lenovo, Chery, BYD, etc

True, but they aren’t dangerous enough for it to be an issue during daily use.

They’re only dangerous if they’re poorly maintained… like any aircraft.