How Much Electricity Does a Smartphone Consume in a Year?

By Ashiqur R.
11 August, 2022
3 months ago
4 Mins Read

Smartphone has become one of the most essential devices nowadays.

From home to office almost for every communication purposes we use this device. We use a phone not only for calling, texting or emailing but also we use it as media recorder, player, streamer, programming and some other complex applications. We pay via our phone, we play games on it and upload/download is very basic in a mobile device. But did we ever think how much power it consumes every day, every month or every year? If then this article is only for you. So without further delay let’s get to some calculation.

casio scientific calculator price in bd

Calculation: There are thousands of models of devices. Every one of them have different specification, here we’re talking about the battery capacity. Before phone were not much heavy like how it is today so batteries were also low powered and these were working perfect. Now with the amount of load the battery sizes increased. In today’s world there are plenty of battery capacity can be seen such as 2500mAh, 3100 mAh, 3500 mAh, 4000 mAh, 4500 mAh and 5000 mAh. Here, we’ll take an average battery capacity such as 4000 mAh. So, let’s begin with it.

In a day, we usually charge our phone once or twice maximum. Let’s take two (2) times. So, if the capacity is 4000 mAh or 4 Ah and battery voltage is around 4.1V then the Power becomes: 4 Ah x 4.1V=16.4 Wh.

Now, if we charge this battery two times in a day then the power usage becomes: 16.4Wh x 2=32.8Wh.

That means in 24 hour/ one day we are using 32.8 Wh power.

So, in one month it becomes: 32.8 Wh x 30=984 Wh.

In one year it becomes: 984Wh x 12=11,808Wh. Or, 11.80 kWh

1kWh = 1 unit of electricity (as per the energy calculation formula)

So, 11.80 kWh=11.80 Unit

In our country (Bangladesh) the cost of 1 Unit (Residential) electricity = BDT. 5.00 or, USD 0.0625

Now, if we multiply these numbers = 11.80 x .0625= USD 0.74


No, this is the exact right answer that we got. It must vary depending on the battery capacity and charging discharging scenario but not rapid at all.

So, do not hesistate while your battery percentage is low. It’s okay to charge your phone anytime.