Generally, phone chargers do not use power when not connected to a device.
Most phone chargers are designed with a low-power standby mode. This means they only draw a minimal amount of power when not plugged in.
The power consumption in standby mode is usually negligible, meaning it's unlikely to be noticeable on your electricity bill.
However, there are a few exceptions:
* **Older chargers** or those with **less efficient designs** might consume a slightly higher amount of power even when not connected.
* **Some fast chargers** might have a higher power consumption in standby mode due to their advanced circuitry.To be sure, you can check the specifications of your charger to see if it mentions any standby power consumption.
If you are concerned about energy efficiency, you can unplug your charger when not in use, especially if you are leaving it plugged in for extended periods.
