Good day!
Not so long ago I was asked a rather interesting question about Energy consumption laptop (does it consume more than a conventional incandescent light bulb). To be honest, I've never compared ...
In general, there is a difference between a laptop and a laptop: it is one thing to compare it with an ultra-beech, and quite another - with a gaming "beast". The difference will be too huge ... 👌
In general, in this article I decided to make small calculations on the power consumption of a laptop: I will show both in kW / h (approx .: kilowatt per hour) and in rubles (I will calculate how much we pay for a laptop per month. By the way, many will be able to independently make such calculations for your device).
I think many will be interested in this (lately, in general, the topic of energy, Eco, etc. is more popular than ever).
And so, more to the point ...
Caricature by Eugene Cran
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Approximate calculations of electricity consumption
👉 1) Determine the output voltages
Take your power supply unit (charger) to the laptop and inspect it carefully: it should have a small sticker (99.99% of devices have it!).
This sticker should indicate the main parameters: model, input and output voltages, manufacturer, etc.
We are interested in output voltage (if you have English text on the sticker, then look for "Output"). In my example below - these parameters are "19V === 6.15A".
Laptop power supply sticker (typical laptop adapter)
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👉 2) We calculate the maximum consumed electricity per hour
Now you need to make a simple calculation: 19V * 6.15A = 116.85 (W / hour).
But in general, most of us are used to counting electricity in kW (and in the receipt for housing and communal services, it is indicated exactly). Therefore, to convert the resulting value to kW, just divide it by 1000.
116.85 W / h: 1000 ≈ 0.117 kW / h.
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👉 3) We calculate how much we pay for it in rubles ...
It all depends on how much electricity costs in your area. For simplicity of calculations, I will take a figure of 5 rubles. per 1 kW (this is even slightly higher than the average in our country).
Thus, it turns out:0.117 kW / hour * 5 rubles / kW = 0.585 rubles / hour.
Those. the maximum cost of an hour of work for a laptop with such a power supply unit will be about 0.585 rubles. Whether it is a lot or a little, everyone will decide for himself ...
Actually, now, to determine how much you pay for his work per month, simply multiply the resulting number by the number of hours you spend at your laptop.
For example, if you work on average for a laptop 3 hours a day, then we get the following picture:
3 hours * 30 days * 0.585 rubles / hour ≈ 52.65 rubles (per month)
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👉 4) About errors and important aspects
Now I want to make a small digression ...
The point is that our counts exemplary , and they are calculated for the maximum load of the device.
But for most users, the laptop is not loaded 90-100% all its time in order to "eat" the maximum amount of energy, which means that the power consumption will be less (for accurate measurement to each watt, you will need special devices, and I think that most of this not necessary and not interesting).
Thus, as everyone probably guessed, all the games that are launched, "heavy" editors, converters, etc. - increase the load on the laptop, and therefore increase the power consumption.
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👉 5) To reduce electricity consumption, you can:
- optimize Windows, disable (uninstall) all rarely used programs;
- try to load the laptop less with resource-intensive applications;
- put laptop into mode reduced power consumption (this function is available in the power settings). You can simply click on the battery icon in the tray: in many devices, a window will appear to adjust the power consumption.
Balancing performance and energy consumption
- Pay attention to the brightness of the screen: too much brightness not only increases power consumption, but is also harmful to the eyes (however, it is also harmful and too low). Therefore, it is important to strike a balance here.
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PS
By the way, a switched off laptop, but connected to a power outlet, still consumes energy! True, very little, only about 3-5 W / h. For a month, this amounts to about 3 kW (or about 15 rubles). Such is the entertaining arithmetic ...
👉 To summarize!
A typical "average" laptop consumes energy comparable to a conventional incandescent light bulb (ie about 60-100 watts).
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That's all for now ... Add-ons are welcome!
Good luck to all!
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First published: 23.05.2018
Correction: 09/13/2020
