Why You Should Never Leave Your Phone Charger Plugged in Without Your Phone | May 17, 2025

Why You Should Never Leave Your Phone Charger Plugged in Without Your Phone
In today’s tech-centric world, a plugged-in phone charger has become a common sight in households, often left even when not actively charging a device. This common practice raises questions about energy consumption, safety, and its impact on electricity bills. There are a few reasons why leaving your charger plugged in without your phone is not as harmless as it seems.
The Power of A Phone Charger

Chargers consume power even when not actively charging a device. A test using a genuine Apple phone charger revealed that it uses approximately 130W of power a month, translating to 1.5KW h a year. While this might seem negligible at first glance, the cumulative effect becomes significant when considering multiple chargers.1It’s essential to consider the number of chargers in use and their individual power draw. Larger chargers tend to consume more power, and non-genuine chargers may take significantly more, up to 10 to 20 times based on testing. Additionally, the environmental impact of millions of continuously-running chargers should not be overlooked, contributing to increased kilowatt hours and carbon emissions.
Fire Hazard: A Real Concern
Leaving a phone charger plugged in poses a potential fire hazard. Overheating chargers, especially when buried under items like clothing or books, can lead to increased temperatures and pose a risk of fire. This danger is amplified when dealing with non-branded, low-quality chargers that may not adhere to safety standards.2Energy expert Glenn LaMay assures that leaving a phone charger plugged in all day doesn’t pose a fire hazard, as all electrical appliances, including chargers, must pass safety tests before being sold to consumers.3

Continued on next page