This is how much it costs you to charge your phone for a year

This has got to be some sort of joke?

Since we switched from the tireless bricks of the early 00’s, to today’s power-thirsty smartphones, you’ve no doubt clocked up a fair few hours plugged into the mains.

If your charging habits are anything like mine, hours aren’t an appropriate unit of measurement at all. We’re talking about all night, every night, going back the last seven or eight years.

That sort of thoughtless charging ritual, you’re probably just as guilty of, can’t be good news for your electricity bill. How could it?


After applying some simple maths to an iPhone 7, as an example (other phones will be similar), it turns out that the cost of charging your device, for an entire year, comes to a grand total of… wait for it… 38p.


Just a tad surprising, right?

Here’s how we worked it out. Start with the cost of a kilowatt hour (kWh), which is an average of about 10p in the UK.

Then look at an iPhone 7 (the numbers are pretty similar whatever phone you have), we know it comes with a 5W (0.005 kilowatts) charger that will juice the 1960mAh battery up from empty to full, in roughly 2.08 hours.

So, multiply the 2.08 power time with the 5W charger, giving you a total of 10.4W. That’s the total amount of electricity your iPhone barely sips from the grid every time you replenish from 0% to 100%. Given that a kilowatt costs 10p, 10.4W will set you back a cool 0.104p. Not even close to a full penny.

Finally, if you do charge your phone every night, extrapolate that 0.104p over 365 days, giving you a yearly bill of around 37.96p. Today, a Freddo will cost you more. But that’s a whole other issue.


      • James,
        This seemed obvious to me, so I think you apology unnecessary, even though well intentioned. By the way I have had both apple and android offerings (currently a Samsung S7).

        • Me too, Mark. I was a huge HTC fanboy back in the day, buying the Hero, Legend, Sensation and Desire. Gave Apple a go when the iPhone 4S launched, fell in love with the operating system and have struggled to go back to Android ever since. Totally different experiences.

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