Fast charge technology: what is it?

Recently, smartphones have increasingly begun to receive support for one or another fast charging technology. But this fact does not please some buyers, but only scares. They believe that fast recharging speeds up the process of battery failure. Today we will try to find out if this is so.

For a long time, mobile phones did not need accelerated charging. Why, if the device was connected to the charger only once every three to four days? But with the advent of smartphones, everything has changed. These devices have increased power consumption. As a result, we are already accustomed to the fact that in most cases they need to be charged every night. But what if you forgot to connect the gadget to the charger in the evening, and in the morning you need to go to work? It is in such situations that quick charging saves. While you brush your teeth, make the bed and are going to work - the battery will recharge by 50% or even more. Let's talk about this technology in more detail.


Traditional recharge

Any battery operates on the principle of an electromechanical process. It starts in both directions - the battery can receive energy, accumulating it, or give it away. For many years, engineers have tried different chemical current sources. Previously, nickel and lead were used , but now all batteries for mobile phones are based on lithium . They can be lithium-ion or lithium-polymer - this is completely irrelevant, as fast charging technology works with both types of batteries. The main advantage of lithium is that it does not have a “memory effect." As a result, you can not wait for the moment when your smartphone is completely discharged. And it is not necessary to charge it up to 100%. If not for this fact, then a quick charge would be useless. As for the disadvantages of lithium batteries, they consist in a gradual loss of capacity and fire hazard.

In modern smartphones, batteries with a capacity of 2,000 to 7,000 mAh are put. The nominal voltage of the battery most often equals 3.5-3.7 V. With its full charge level, the voltage can be increased to 4.2 V, which allows to increase the performance of the processor and some other components. As for charging the battery itself, it used to be very simple - the current came in with a strictly defined power until the moment when the charge level reached about 90%. Then the power gradually decreased, so as not to “recharge” the battery, a special controller did it. And so on until reaching a 100 percent charge. As a result, the recharge time was 2-2.5 hours, depending on the capacity of the battery.

How does fast charging work?

The first to change something was Qualcomm . In 2012, she introduced the first version of Quick Charge technology. According to the idea of ​​the manufacturer of mobile chipsets, at the first stage, the charger should give a current of the maximum possible power. And when the battery controller understood that the charge level had reached a certain level, the power went down.

How is the quick charge function different from the usual? Let's look at an example. Take the most common charger for your phone (pictured above). On its case we will see the inscription: “Output 5V / 1A”. This means that as much as possible the device displays a current with a voltage of 5 volts and a power of 1 ampere. The output power of this charge is approximately 5 watts. Quick Charge 1.0 technology has changed a little. The smartphones supporting it learned to accept electricity with a current of 2 A. All other parameters of the charger remained the same. With the same battery capacity, full charge is 30% faster.

The second version of technology from Qualcomm turned out to be much more interesting. It consists in an even closer interaction between the battery controller and the charger. From now on, the current strength could reach already 3 A. Also now, during the charging process, the voltage changed - at first it is 12 V, then it drops to 9 V, and finally it drops to the standard 5 V. Compared to using a traditional charger, the process was already accelerated by 60 %! The disadvantage of this technology is the high cost of the charger, because a special chip is built into it. However, most consumers do not care, because most often the charger is bundled with a smartphone, and the need to buy a new one is extremely rare.

In September 2016, Qualcomm introduced Quick Charge 3.0 technology. Its charging devices and battery controllers are even more intelligent. Now the optimal voltage is selected individually for a specific device and battery level. The voltage now ranges from 3.6 to 20 V. The step of the change is only 200 mV. As a result, the third version of the technology turned out to be 38% more effective than the second. Support for Quick Charge processors received Snapdragon 430 , 617, 618, 620 and 820.


Not all smartphones have a Qualcomm processor. Fortunately, other fast charging technologies are also found in various Android devices. Almost all of them work according to the above principles. At the same time, the phone can be connected to a high-performance charger from another manufacturer - nothing will happen to it. In some cases, its power controller will allow you to charge your smartphone at an accelerated pace. In other cases, recharging will go in the traditional mode - with a current of 1 or 2 A. In any case, the charger will not harm the device.

However, it is better to still use the charging that came with the kit. In the world there have been cases when the battery for some reason flashed. This was facilitated by the Chinese charger and low-quality USB cable.

Separately, it should be noted products under the OPPO brand. She uses the unique VOOC Flash Charging technology. The batteries of the smartphones endowed with it have eight contacts. Electricity enters the battery with a current of 4.5 A and a voltage of 5 V. The battery consists of several cells and the current is evenly distributed between them. As a result, recharging is very fast. The manufacturer also claims that its technology is more careful about the battery, without reducing its service life.

Is quick charging harmful to the phone?

Most of all, some people are afraid that the fast charging of the smartphone is carried out with the help of amplified current. It seems to them that the battery does not tolerate this attitude. Allegedly, in a year it will have to be changed. Indeed, the first fast charging technologies had an unpleasant feature. The working capacity of the battery was quickly reduced if the smartphone was used too actively, charging it once or twice a day. However, since 2012, a lot of water has flowed; now everything has changed.

Modern technologies allow the power controller to receive electricity in the amount that the battery needs in a given second. Amperage and voltage never exceed thresholds. All this is confirmed by numerous experiments from independent experts. They showed that the capacity of the battery drops at the same rate as when using a conventional charger. Therefore, you can not be afraid to use fast charging - it will only make your life easier.

How to disable fast charging?

If you are still afraid of fast charging, then your further actions depend on how fresh your smartphone is. The fact is that on modern devices support for this technology is implemented at the level of the controller and firmware. Disabling fast charging in such gadgets is most often impossible. The only way out is to purchase another charger that does not support fast charging technology.

Well, on smartphones 2012-2014, you can still disable this function. This is done in the " Settings ", in the " Battery " section. On Samsung devices, you may need to visit the preinstalled Smart Manager application.

Fast Charging AC Adapters for Samsung and Apple

South Korean company Samsung equips many of its smartphones with proprietary technology for fast charging. An appropriate adapter is supplied with the device. However, some users lose this small accessory, while others require additional “charging”, for example, for use at work. In a word, it would be surprising if the South Korean giant did not sell power adapters separately.

In Russian stores, products with support for fast charging from Samsung cost from 1,200 to 1,500 rubles - this is quite an adequate price. Adapters are supplied with or without cable. It also differs in what connector the wire is equipped with - for a long time there are options with USB Type-C , since the flagships have just such a socket. The largest number of “charges” performed is painted white. But if you try, then on sale you can find a black version, which is much less common.

With the iPhone, things are much more complicated. Apple has endowed the iPhone 8 , iPhone 8 Plus and iPhone X with support for fast charging. However, a specialized mobile charger that can transfer large amounts of energy has not been released. In this regard, in the box with a smartphone you can find the simplest adapter with a current strength of 1 A. What to do? There is only one way out: to go to the store for the Apple network adapter, which was originally intended to be connected to the MacBook.
Any of the three iPhone above supports 29 W, 61 W, and 87 W power adapters. The higher this parameter, the faster the recharging will take place. The problem is that powerful network adapters are too large - you can’t put such an accessory in your pocket. Once again, they were designed for subsequent use in tandem with a laptop, so there was little point in reducing the dimensions. Another important drawback of such adapters is the price. For an option with a power of 61 watts, you will have to pay about 5500 rubles! However, "apple" products are always expensive. But in this case, this is the greed of the manufacturer. Yes, and how can you ask for that kind of money for a thing that is simply inconvenient to use?

Fast Charging AC Adapters on AliExpress

The most famous Chinese online store offers many accessories for smartphones. Including in its open spaces you can find power adapters with support for fast charging. For example, a Fonken network charger with miniature dimensions is delivered directly from a warehouse in Russia. The device is primarily intended for smartphones and tablets that support Qualcomm Quick Charge 3.0 technology. The cost of the accessory is approximately 500 rubles. Not bad, especially when you consider that a meter cable with a high-quality braid is supplied with it.

Buy Fonken Charger

The Tiegem adapter also has support for the same fast charging technology. This device is estimated at 800 rubles, but it is much more universal. The fact is that up to two gadgets can be connected to this charge - this is exactly the number of USB ports built in here. The current strength is 2.4 A, and the power is 30 watts. This charger is ideal for products of Huawei , LG and other large companies.

Buy Tiegem Power Adapter

Of course, this is not a complete list of power adapters sold through AliExpress . Here you can find accessories of various shapes and colors. There are even solutions with five connectors! Also, for some time now, the Chinese online store allows you to buy original products from the same Samsung - South Korean adapters are now also in the assortment of AliExpress.



    • What is the checkmark? As far as I know, the new Samsung does not even have such an item in the menu - it is impossible to turn off fast charging. And now, if anything, “Fast charge” is not written on the lock screen. At least on some firmware. On my Galaxy A5 2016 in the first half of the year was not written. And after the update in early summer, this inscription appeared again.

      • On the lock screen, the Fast Charging entry disappeared, but also with it the charging process itself takes 3-5 hours to charge. This is terrible compared to fast charging. This seems to be a puncture

        • On the lock screen, the Fast Charging entry disappeared, but also with it the charging process itself takes 3-5 hours to charge. This is terrible compared to fast charging. This seems to be a puncture

          • It is possible that something happened to the charger itself. Or with the power controller in the smartphone, but less is believed in it. I can’t even suggest anything more.