Why Every Power Supply in Your House Says “100–240V” (A Story About Japan)
I was getting ready for an upcoming trip to Europe and picked up my laptop's power brick to check the voltage. The label said 100 to 240V, which was fine. But then I noticed something odd: who runs on 100 volts? The answer turned out to be one of the best pieces of accidental history I've ever stumbled into.https://mikehowells.com/2026/06/28/why-every-power-supply-says-100-240v/











