Does Leaving A Phone Charger In Use Electricity. For example if you still have a cell phone or other portable electronics device from the 90s its charger might continually use a noticeable amount of power if you leave it plugged inbut even that amount of vampire power probably wont make a noticeable dent in your electricity bill. Since our handheld devices have become so important in day-to-day life many of us are in the habit of leaving chargers constantly plugged in.
A device rated at 1000W running for one hour will use 1KW h while a device rated at 100W will take 10. An EE and I tested a car ipod charger to find out exactly that. Alternating Current AC Vs Direct Current DC Once the step-down transformer reduces the voltage to the order of 5 V and AC.
Since they draw electricity from the outlet a fire may occur if a wire is short-circuited or the charger comes into contact with water.
But how much power does it consume. Always leaving a laptop computer plugged in even when its fully charged can use a similar quantity45 kilowatt-hours a week or about 234. A phone charger thats plugged into the wall but not charging anything uses a maximum of 1 watt per year. There is a small but important safety risk to consider when leaving cell phone chargers plugged in.
