That headline is a bit dramatic, but there are a few real (and often misunderstood) reasons people are warned about leaving chargers plugged in with nothing attached.
Here are the 3 main reasons, in a grounded way:
1. Small but constant power waste (“vampire power”)
Even when your phone isn’t connected, many chargers still draw a tiny amount of electricity just by being plugged in. It’s usually very small, but across many devices in a home, it adds up over time on your electricity bill and energy use.
2. Heat and fire risk (rare, but not zero)
A good-quality charger from a reputable brand is designed to be safe when idle. But cheap, counterfeit, or damaged chargers can overheat or fail internally. Leaving them plugged in continuously slightly increases exposure time to faults, dust buildup, or power surges.
3. Electrical surge vulnerability
Chargers left plugged in are still connected to the power line. During voltage spikes (like lightning storms or unstable grids), a plugged-in charger has a higher chance of being damaged—or in worst cases, causing heat damage. A phone being connected doesn’t really change this risk much; it’s the wall connection that matters.
Bottom line:
For modern, certified chargers, leaving them plugged in without a phone is generally safe. The real concerns are minor energy waste and reduced safety margin with low-quality or aging chargers—not something most people need to panic about.
If you want, I can also tell you when you should definitely unplug chargers (there are a few specific situations where it actually matters).
