How much does it cost to charge your smartphone for a year?

How much does it cost to charge your smartphone for a year?

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Smartphones are very energy efficient. It costs less than $1 to fully charge a smartphone battery every day for an entire year. This is true for iPhone, Samsung Galaxy, and other Android phones.

Most of us charge our phones without a second thought because it is an indispensable part of modern life. But how much do we spend annually to keep it fully charged and ready to go?

Smartphones use shockingly little power

Of all the electrical things you use around the house—computers, televisions, smart speakers, even analog things like light bulbs and ceiling fans—we feel pretty confident in saying that nothing consumes such a tiny amount of energy as your smartphone. This is true whether you’re using an iPhone, a Samsung Galaxy phone, or another type of Android phone.

In fact, we’ll spoil the surprise right away so as not to keep you in too much suspense. You’ll likely pay less than a dollar a year to charge your phone. Not less than a dollar a week or less than a dollar a month. under a dollar every year.

With high energy prices and great power even inert waste equipmentWe should all keep an eye on things, but worrying about wasting any money charging your phone shouldn’t be near the top of the list – or at all.

Here’s how to calculate it yourself

How can we say with confidence that charging your phone is so cheap? Well, two ways. You can repeat both of them yourself at home.

One requires a little math on the back of the envelope, and the other requires you to use a physical wattmeter to monitor your charger. Though, you’ll likely find using a wattmeter more interesting when you’re measuring larger devices like TVs.

Calculate the theoretical shipping cost

The most accurate way to measure the cost of charging your smartphone is to use a physical instrument to measure actual power consumption, which takes into account the energy lost in the charging process. But in practice, it’s a small amount of power, and small, low-voltage chargers are usually very efficient, so there’s not much overhead.

With that in mind, we feel very comfortable using the battery capacity as a reference point for calculating how much energy you’re using to charge it. You’ll need to find your phone’s battery capacity and voltage, in milliampere-hours.

For our example, we will use the battery in the iPhone 13 Pro as a reference point. The iPhone 13 Pro has a 3,095 mAh battery that operates at a voltage of 3.83V.

You can look up the battery capacity of your smartphone model and replace this value in the calculations. Instead of wasting time searching in search engine results, we recommend visiting GSMArena.comHuge phone statistics database, search for your specific phone model to see stock battery capacity and more.

The GSMArena stats not only list the battery’s mAh value but in Watt-hours (Wh), which will let you skip one of our calculations.

But let’s say you do everything from scratch. First, we need to know how many watt-hours of energy your phone battery can store. To do this, we first need to convert milliampere-hours to watt-hours by multiplying the battery capacity by the voltage and dividing by 1000.

(mAh * V) / 1000 = Wh

Based on this equation, our iPhone’s 3,095mAh/3.83V battery has a capacity of 11.85W. It’s the same amount of energy stored no matter how you call it, we simply change the units from mAh to Wh because your electricity usage is measured and billed in kilowatts.

Now let’s calculate the cost of charging an 11.85W battery, assuming it runs out completely. Let’s convert Wh to kWh, the unit your electric company uses to bill you.

Wh / 1000 = kWh

So our iPhone battery capacity is 0.019 kWh. You can then, in turn, find out how much electricity costs by referring to your electricity bill for the value of the cost per kilowatt-hour. We’ll use the national average, which is $0.12 per kilowatt-hour.

Battery Capacity in kWh * Cost-per-kWh =  Charge Cost

Our iPhone 13 Pro, based on the fully efficient charging scenario here, costs $0.0023 to charge from a fully dead state to a fully charged state.

Assuming you run your battery to empty every day of the year and then charge it back up, it will cost you $0.83 – not even $1.

But you probably don’t spend much. I don’t know about you, but with the larger batteries in modern smartphones, I rarely run my battery to full every day, and usually put it back in the charger when it’s still 50% full.

So permanently charging half the battery every day only incurs half the cost of charging. That means, in my case at least, I don’t even spend 83 cents a year to charge my phone, but I get closer to 40-50 cents.

Measure the charger with a watt meter

All calculations in the previous section are based on raw numbers and do not take into account any deficiencies in the charging process.

As mentioned above, the inefficiency of small phone chargers is pretty trivial, but if you really want to know up to $0.001 about the cost of charging your phone, you’ll need Watt meter.

Usually when you use a wattmeter you can get a very accurate reading right away. If you want to know how much power the TV is using, you can just plug it in and turn the TV on and see how many watts the TV draws under load.

But if you’re measuring a charger, you’ll need to leave it plugged in at least for a full charge cycle. And in the case of a very small battery like the kind in a phone, you’ll probably want to leave the watt meter plugged in for at least a few dozen charge cycles to get a more accurate sense of how much and how much. Shipping costs you over time.

Best phone chargers for 2022



USB C TECKNET 65W PD 3.0 GaN Charger Type C Foldable Charger with Three Port Fast Wall Charger Compatible with iPhone 14 Pro Max / 14 Plus / 13, MacBook Pro, iPad Pro, Switch, Galaxy S22 / S21


Apple 20W USB-C Power Adapter – Fast Charging iPhone Charger, Type C Wall Charger.


Amazon Basics 100W 4-Port GaN Wall Charger with 2 USB-C Ports (65W + 18W) and 2 USB-A Ports (17W) – White (Non-PPS)


Anker Wireless Charger Wireless Charger 313 (Pad), Qi 10W Max Certified for iPhone 12/12 Pro/12 mini/12 Pro Max, SE 2020, 11, AirPods (Without AC Adapter, Not Compatible with MagSafe Magnetic Charging)


USB C Car Charger 48W Super Mini AINOPE All Metal Fast USB Car Charger Adapter PD & QC 3.0 Dual Port Compatible with iPhone 14 13 12 11 Pro Max X XR XS 8 Samsung Galaxy Note 20/10 S21 / 20/10 Google Pixel


Texmarter 11-Port Charging Station with five 100W USB-C PD, PPS 25/45W, five 18W USB-A, and detachable 15W wireless charger base. Compatible with MacBook, iPad, iPhone, Samsung, Dell, HP, Yoga…


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