Some household devices are better left unplugged when the day is over. Fire-safety guidance and energy research show that certain appliances and chargers deserve more attention than others, whether because they generate heat, rely on lithium-ion batteries, or continue drawing power while idle. Knowing which plugs are worth pulling can make a nightly routine safer and more efficient.
Why Electricians Think Differently About Plugged-In Devices
Most people assume that a switched-off appliance is a safe one. Electricians know better. Even when a device is not actively in use, it continues drawing electricity from the outlet, which is a phenomenon researchers call standby power. According to Lawrence Berkeley National Laboratory, nearly all modern electrical products, including televisions, microwave ovens, and air conditioners, draw power around the clock, often without the homeowner realizing it (source).
That constant low-level draw adds up across an entire home. Standby power collectively accounts for roughly 5 to 10 percent of residential electricity consumption in a typical American household (source). Electricians who understand this dynamic make a point of cutting that waste every night by physically disconnecting devices they know do not need to stay powered.
Beyond the energy cost, there is a more important safety concern. The U.S. Fire Administration estimates that residential electrical malfunctions caused about 26,400 fires in 2024, resulting in 255 fatalities, 800 injuries, and roughly $1.56 billion in property losses (source). The agency also advises homeowners to unplug small appliances when they are not in use as part of its electrical fire-prevention guidance (source).
Space Heaters: The Overnight Risk That Cannot Be Ignored
Among all the devices electricians pull from the wall at night, portable space heaters rank at the top of the list. These units are designed for supervised use only. Safety instructions from manufacturers commonly direct users to unplug space heaters whenever the device is not in active operation, and electricians echo this guidance without exception (source).
The risk is straightforward: a space heater left plugged in overnight generates heat near flammable materials while no one is awake to respond. No matter how new or well-maintained the unit appears, electricians treat space heaters as devices that should never be left connected to power unattended.
Devices With Lithium-Ion Batteries Deserve Special Attention
Laptops, e-bikes, power tool battery packs, and similar devices powered by lithium-ion batteries have become a growing concern among fire safety professionals. In New York City alone, lithium-ion battery incidents have caused hundreds of fires and dozens of deaths since 2022, according to data from the National Fire Protection Association (source).
Electricians are particularly cautious about leaving these devices charging overnight, especially when they are on soft surfaces like couches or beds that restrict heat dissipation. Disconnecting lithium-ion devices from the charger once they reach full capacity, or at minimum before going to sleep, is a habit professionals in the field consistently recommend.
Kitchen Countertop Appliances Are Frequently Forgotten
Air fryers, toaster ovens, and coffeemakers tend to sit on kitchen counters and stay plugged in indefinitely. Electricians point out that heat-generating countertop appliances carry a real overnight fire risk, especially when grease residue or food crumb buildup is present inside or around the unit (source).
These appliances do not need to remain connected when no one is in the kitchen. Pulling the plug takes seconds and eliminates any chance of a malfunction or electrical fault igniting residue inside the machine during the night. Professionals who work with residential wiring regularly see how appliances in seemingly fine condition can still present hazards when left powered for extended periods.
Video Game Consoles and the Hidden Cost of Vampire Power
Gaming consoles represent one of the more surprising items on an electrician’s nightly unplugging list. Even when a console appears to be off, it typically remains in a standby or quick-resume state that keeps it drawing power continuously. This behavior makes video game consoles one of the largest contributors to vampire power — electricity consumed by idle devices — in the average home (source).
The annual financial impact is not trivial. Leaving a gaming console plugged in year-round can cost a household fifty dollars or more in electricity, even when the device appears inactive (source). Electricians who track household energy efficiency often identify the entertainment center as one of the quickest areas to generate savings through simple disconnection habits.
Extension Cords and the Appliances That Should Never Use Them
One additional behavior electricians consistently flag is the misuse of extension cords with large appliances. Refrigerators, stoves, washing machines, and dryers should always connect directly to a wall outlet. Running a major appliance through an extension cord forces more current through a wire not rated for that load, which can cause the cord to overheat and potentially start a fire (source).
While this is not strictly a nighttime concern, electricians address it alongside unplugging habits because the underlying principle is the same: unmanaged electrical connections create risk. Whether the issue is a device drawing phantom power, a battery pack overheating, or an overloaded extension cord, the solution often involves being intentional about what stays connected.
Why You Should Learn More About Household Electrical Safety
The nightly unplugging habits that electricians follow are rooted in a clear understanding of how everyday devices behave when left to run unattended. Space heaters, lithium-ion battery devices, countertop kitchen appliances, and gaming consoles each present distinct risks, whether fire hazards, energy waste, or both.
The U.S. Fire Administration’s data makes the stakes clear: residential electrical fires cause hundreds of fatalities and billions in property damage every year (source). Standby power research from Lawrence Berkeley National Laboratory confirms that the average home loses a meaningful share of its electricity budget to devices that are not even in use (source). Understanding which devices to disconnect, and why, is one of the simplest and most impactful habits any homeowner can develop for both safety and efficiency.