The next generation of wall chargers
Not seeing UL or CSA approval numbers on those.<p>That's important for switching power supplies, especially small ones. A switching power supply is always a few milliseconds from being a short circuit across the input. And FETs fail in the ON state. That's why those things are inherently fire risks and need protection circuitry. Really tiny ones make it worse; if they fail, there's not much space to dissipate heat before something blows and opens the circuit.