Chargers are essential for everyday devices—but is it safe to leave them plugged in when not in use? Discover what an expert ...

A lot of those cases were tied to power banks and e-cigarettes, which is why policies are so strict regarding batteries in carry-ons. Usually, sizes are capped at 100 watt-hours.

The little box in the middle of your laptop charger is incredibly important — it's responsible for converting AC power to DC ...

But essentially, fast chargers are able to deliver the right amount of power because of fast charging protocols, like the USB PD, Samsung Adaptive Fast Charging, or the Huawei SuperCharge.

USB ports generally supply about 5 volts at up to 2.4 amps, which is perfectly safe for powering a phone charger, laptop, or similar devices. The bigger issue isn't the plane's outlet; it's the ...