Myth Or Truth:Wi-Fi Spends More Battery Than 3G?

About five years ago, thinking about buying a notebook was something unique to the wealthiest classes in Brazilian society. The portable models were expensive, not to mention the values ​​of maintenance, which compared to the desktops had exorbitant prices and little advantage to the vast majority of users.

Over time, prices have been falling.As a result consumers began to buy the products without needing so many financial sacrifices.It can be said that the growth of the credit markets and the subsequent fall of the dollar contributed a lot to the construction of this scenario favorable to the expansion of the consumption of transportable computers.

It is a fact that, along with the expansion of notebooks (and later netbooks) and mobile phones, another market has grown significantly: mobile internet.Not only that of mobile operators, but also the wireless internet of wireless routers, which allow the connection of computers to points without limiting cables.

But you can not forget the big problem that plagues almost the absolute majority of users of notebooks, netbooks and smartphones:battery life. What consumes most energy is the use of the computer’s graphics card, as it requires various processing and memory utilization features.

When connected to a network cable, being connected directly to the router, it is difficult for the computer to consume much energy from the battery. But when the case is different and the internet is accessed by wireless devices, the story is a bit different. But what is the most economical way, wireless networks or 3G internet?

Financial economy and speed

In terms of cost-benefit, it can be said that wireless internet has some advantages over 3G, because there are several free access points in most of the capitals, such as malls and universities. In addition to the fact that in homes the speed is quite satisfactory, because it is connected to broadband internet routers.

On the other hand, 3G internet, even though it is more expensive than its competitor, is superior for many cases where there is urgency in accessing the internet. This is because it is offered by mobile operators, thus possessing a very large range, even if the signal is not strong in all places.

Battery consumption

The main idea of ​​this article is to present some relevant questions about the energy consumption of each of the models of access to broadband internet networks. With this, Baixaki Portal intends to provide enough information so that each one evaluates his own needs and decides for a type of internet for his notebooks.

According to Marcelo Daou, Manager of Consumer Experiences at Nokia’s Institute of Technology, there are a number of variables that can make each technology spend more or less energy at certain times. The wireless internet has strong consumption peaks at times when the board scans for networks, while the 3G internet spends a lot of battery in cases of network timeout, as this increases the connection establishment time.

The Baixaki Portal sought Luiz Mariano Julio, CTO (Chief Technology Officer) of Positivo Informática to be able to clarify this doubt that so much intrigues much of the users of laptops and other devices with mobile Internet.

3G internet

The connection offered by mobile operators consumes a lot of energy, it’s true.This is for a very simple reason: distance.Yes, the distance between the 3G modem and the communications tower of the mobile operators can be up to a mile.

In a practical example: When you turn on your notebook and connect the 3G modem (or a smartphone with the built-in modem) to it, the signal needs to be set at fairly long distances, which generates a large energy expenditure.

Even though power consumption stabilizes at times, uninterrupted contact with the operator’s data center causes the device’s battery to be “sucked” faster than when using Wi-Fi networks.


Wi-Fi is the connection that offers the standard broadband signal, but rather than using cables connecting the router and computers, the signal is transmitted through an antenna and a wireless network card.Notebooks, netbooks and most smartphones are already sold with this device.

As has been said in this article, access is facilitated by the large number of hot spots dotted around the big shopping malls in the cities, or even in universities and other hot spots.

These networks operate in restricted areas, that is, although notebooks consume a lot of energy when searching for new networks, the wireless card uses less energy after being connected to the antenna and therefore cheaper than the network 3G.

Final considerations

Analyzing the information in this article is clear to everyone that the Wi-Fi internet does not spend more battery power than 3G, and the factor that most contributes to this is the huge distance that exists between computer and tower transmitting 3G signal. Therefore, it is proved that this is only a myth.

And you use what connection on your notebook? Do you see effective differences when comparing the two types of mobile connection? Leave a comment telling Portal Baixaki your preference when connecting to the internet without the use of cables.

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