Most of us charge our smartphones overnight when we sleep. But it usually takes just 2 hours to fully power up (charge) the battery on our phones. So how much does it cost if we leave our phones plugged after those two hours while we sleep? And what is the cost of leaving the charger plugged into the wall even if the phone isn’t attached to it? Read on to find out!
According to a study, if you unplug your charger from the wall when not in use, over a year you will save the same amount of energy it takes to run (you need to take) a hot bath. In other words, you are not consuming much electricity by leaving the charger in the wall. As the study shows, “repeatedly unplugging the phone charger is like taking water out of the Titanic with a teaspoon.”
The study showed that a charger plugged into the wall used an average of 0.26 watt. When a phone was connected to the charger, the average amount of electricity used rose to 3.68 watt. Once (When; After) the phone is fully charged, that figure (number; amount) reduced to 2.24 watt. For the average household, the study showed an average cost of $5.30 to charge a smartphone on an annual basis (every year; each year).
However, it is no good for your phone’s battery to keep charging for long periods of time after it is 100% charged. This can cause your phone to need a new battery earlier than it would normally need one.
When do you charge your cell-phone? Do you unplug the charger when not in use?
Explain the results of removing (or leaving) the charger. (10 lines)
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