Qualcomm quick charge 3.0 supporting phones. Qualcomm Quick Charge - what it is and how fast charging technology works. What it is

The Xiaomi Redmi 3S smartphone was released a few months ago. It turned out to be so balanced, given the affordable price, and of high quality that it sells like hot cakes at lunchtime. According to various estimates, Redmi 3S and Redmi Note 3 this moment are Xiaomi's best-selling smartphones. Many reviews of this smartphone have already been published. But there are nuances that are not really explained, and disputes are still breaking apart.

The Xiaomi Redmi 3S smartphone is equipped with a battery with an impressive capacity of 4100 mAh. Officially, the smartphone does not have any support for fast charging technology. But various observations and measurements of users indicate the opposite.

I will try to answer the following questions in detail:

Does the smartphone support Qualcomm Quick Charge 2.0 technology?
Does the smartphone support Qualcomm Quick Charge 3.0 technology?
If so, how effectively is support for fast charging implemented in the smartphone?

First, a little theory on the fingers (briefly and roughly, so that everyone can understand). What is QC 2.0? By setting certain voltages on the Data+ and Data- contacts, a charged device, for example, a smartphone, can “communicate” with the charger and switch the charger voltage to 5, 9, 12, 20 V, if it also supports QC 2.0 technology. The current strength remains standard for cables and USB connectors, i.e. The cables do not need to be replaced with any special ones, but the power increases significantly. What is QC 3.0? This is QC 2.0 essentially, except fixed voltages, the device being charged can still request a voltage change in steps of 0.2 V in the range of 3.6 - 20 V, i.e. incremental voltage change. This is necessary in order to unload the step-down converter in certain (focus on this word) situations, for example, in a smartphone, thereby reducing the heat generated by the converter at these certain moments. Some people think that QC 3.0 provides faster charging than QC 2.0 - Qualcomm's marketing is to blame for this, by the way. But it is not so. QC 3.0 can provide more efficient charging by generating less heat in the device being charged, and then only at certain times, which does not always mean faster. But as real practice with smartphones shows, in the vast majority of cases there is no gain in speed between QC 2.0 and QC 3.0, because Smartphones easily handle heat dissipation on their own. And, yes, although this is trite, if a smartphone supports QC 3.0, then it supports QC 2.0.

Xiaomi Redmi 3S is equipped with Qualcomm Snapdragon 430 SoC. It has support for Qualcomm Quick Charge 3.0. But this is not enough for full implementation. We also need support in the smartphone hardware and system software. Those. The presence of such a SoC does not at all guarantee the availability of QC 2.0/3.0 support. Moreover, the manufacturer, for its own reasons, for example, marketing, or due to technical limitations of the battery, may impose a limit on power consumption. To the point that the device may support QC 3.0, but the charging speed is no different from the usual one at 5 V.

It so happened that my mother wanted to change her samsung smartphone Galaxy S III, which I gave her quite a long time ago. The main complaint is the short time battery life and lack of LTE support. Of course, the choice fell on Xiaomi Redmi 3S. But I couldn’t give it away without tests. Now let's move on to practical testing.

Testing Tools

Standard memory that comes with Xiaomi Redmi 3S.
Memory with support for QC 2.0.
Memory with support for QC 3.0.
ZKE EBD-USB tester.

The standard memory does not support QC 2.0/3.0 technology. Rated voltage 5 V, maximum current 2 A. Chargers with support for QC 2.0 and 3.0 honestly can deliver 18 W and can compensate for losses on the cable, increasing the voltage as the current increases.

The smartphone will charge when turned on with the screen turned off.

Charging using standard charger

The smartphone comes with a very high-quality standard memory. I tested it separately. Firstly, it can compensate for the voltage drop on the cable when the current increases. Those. as the current increases, the voltage also increases up to 5.4 V at 2 A (which corresponds to the USB 2.0 standard - up to 5.5 V). Secondly, it is guaranteed to output 2 A. You can find a breakdown of this charger online, everything inside is perfect.

The smartphone charging schedule looks like this:

The peak power of CC mode is about 10-11 W. The smartphone needs 1 hour and 45 minutes to charge the battery to approximately 86% (this is not the data from the smartphone, but the percentage of the total energy consumed during the entire charging process in CC mode). Total charge time 2 hours 42 minutes(the smartphone reported 100% charge).

Charging using a charger that supports Qualcomm Quick Charge 2.0

The charge graph shows that the charger switched at the request of the smartphone to a voltage of 9 V. The power of current consumption at the CC stage is about 10-11 W. The smartphone needs 1 hour and 40 minutes to charge the battery to approximately 86%. Total charge time 2 hours 32 minutes.

Here is the answer to the first question. Yes, Xiaomi Redmi 3S formally supports QC 2.0. This is clearly visible from the voltage used - 9 V.

Charging using a charger that supports Qualcomm Quick Charge 3.0

The charge graph shows that the charger switched at the request of the smartphone to a voltage of 6.55 V. The power of current consumption at the CC stage is about 10-11 W. The smartphone needs 1 hour and 40 minutes to charge the battery to approximately 86%. Total charge time 2 hours 33 minutes.

Here is the answer to the second question. Yes, Xiaomi Redmi 3S formally supports QC 3.0. This is clearly visible from the voltage used - 6.55 V.

Comparison and conclusions

The smartphone supports Qualcomm Quick Charge 2.0/3.0. But this support is only formal. It is not for nothing that the manufacturer does not indicate anything about it in technical specifications. In all cases, the power is software limited to 11 W, and the full charge time is similar in all three cases. Whether this was done for marketing reasons (I believe this was done to compensate for the attractiveness of the company's more advanced models) or due to the technical limitations of the battery itself, we will never know.

You do not need to specifically buy a memory with QC 2.0/3.0 support for this smartphone. It comes with a very high-quality memory that fully matches the capabilities of the smartphone.

Most likely, everything described in this article will also be applicable to the new Xiaomi Redmi 4. It has a similar battery, and support for QC 2.0/3.0 is not announced.

P.S. Do you know what was the most painful thing about the test? It sounds strange, but it is forced to discharge the Redmi 3S 3 times under maximum load. Often you want some smartphone to work longer. I wanted to discharge it faster, but I wasn’t very good at it. The Snapdragon 430 SoC and a 4100 mAh battery are an explosive mixture that resists discharge by any means. Instead of the planned one day for the article, I had to spend one and a half.

Another fascinating article awaits you ahead - " Blind testing using an example Xiaomi cameras Redmi 3S: is RAW/DNG support needed in smartphones with budget cameras? ", in which you will act as arbiters of destinies.

P.S. II. Friends, unfortunately, blind testing of camera images is canceled before it even begins. It turned out to be not so simple. It's easy to enable the Camera2 API on your smartphone. Manual mode works perfectly. Shooting in RAW works in many programs that support the Camera2 API. But the resulting DNG files cannot be opened anywhere. The system gives out in some incomprehensible format. Yesterday I disassembled the camera application from Mi5S, checked for support for RAW mode (the standard program in the new versions of MIUI for Mi5S and Mi5S Plus can shoot RAW) and a bunch of various modes, including manual mode. Installed it on Redmi 3S. Fully manual mode, RAW saving, many other modes, it all worked. But again the DNG files could not be opened anywhere. The only program that was “able” to save opened DNGs is FreeDCam - it bypasses the Camera2 API. Considering that it’s difficult to find a program with a more terrible interface, and RAW shooting is only possible with auto settings for shutter speed and ISO, I decided to cancel the article. Sorry. But I will definitely return to this topic later. Let's wait for Redmi 4 and new versions of MIUI, maybe everything will work there.

Smartphone Xiaomi Redmi 3S in 2/16 and 3/32 configurations can be purchased from the GearBest online store. And with a coupon GBmi3S2 This lot 3/32 will cost $125.

Taking a long time to charge your phone is a very common problem among users of modern gadgets. There is often not enough time to recharge, and the battery burns out at the most inopportune moment.

Fortunately, smartphone manufacturers, including the Xiaomi brand, solved this problem when they added the function Quick Charge– ability to quickly charge your phone.

What it is

Xiaomi Quick Charge– the ability of Xiaomi smartphones to charge the battery many times faster than normal charging, reaching the full battery in almost 30 minutes.

Its main task is to fill the battery with the volume that will not damage it as quickly as possible.

How does Quick Charge work?

The operation of this option is based on the large consumption of current power during the power supply process itself (limit – 20W). If the battery is completely discharged, maximum power will be absorbed at the beginning of the power supply, and less and less as the power supply progresses.

Current power according to the formula– product of current (I) and voltage (U). That is, by increasing the current power, either the voltage or the current increases, and in this situation the battery receives faster required charge energy.

A visual explanation of this principle:

How did the creation of Quick Charge begin?

When the Quick Charge fast charging function was in the first stage of its inception, the developers tried different methods reducing the time it takes to recharge the battery. Originally, Quick Charge was based on increasing the current. The first power supplies had the ability to receive a current of 2A at a voltage of 5V. As a result, the required power was 10 watts.

But this method was unpromising, since subsequent work with the current required a change in the cross-section of the wire, and it was decided to increase the voltage instead of the current.

Since it was impossible to produce the maximum voltage “out of the blue,” motherboard They began to add special controllers that are capable of receiving voltage greater than the usual 5 Volts, converting it into the required battery charge.

Quick Charge technology versions and maximum power absorption

By transforming Xiaomi fast charging, the developers also increased its capabilities, that is, the consumed current power.

Characteristics and differences between Quick Charge versions

Today there are 4 lines of this technology, but for the most part the manufacturer Xiaomi uses only three:

Quick Charge 1.0– version presented in 2013. Literally immediately won consumer sympathy and was used in many phones. It allowed the device to be charged 40% faster than usual, which means that the phone could be half charged after 40-50 minutes. It was in almost every phone with a Snapdragon processor.
Quick Charge 2.0– an improved version of fast charging helped charge the gadget even faster. The charge was at half capacity after 30 minutes.
Quick Charge 3.0- very similar to the previous one, with the exception of a new significant function “INOV” - Intelligent Negotiation for Optimum Voltage - the most accurate selection of the voltage required for charging and monitoring the “well-being” of the gadget. After 20 minutes, the phone can be charged by 50%, and after half an hour – by 70%!
Quick Charge 4.0– version based on the new Snapdragon 835 processor. Fills the battery halfway after 15 minutes.

In mid-2017, the manufacturer presented a new version from Qualcomm – Quick Charge 4+, which can charge 2750 mAh batteries by half in less than 15 minutes, and with a 5-minute charge the phone can last up to 5 hours.

INOV technology – Intelligent Negotiation for Optimum Voltage

INOV technology- this is the new ability of Quick Charge to establish a relationship with the phone during the power supply process - the unit receives the necessary data on the state of the battery, with the help of which it monitors the received power, current, voltage, and temperature of the smartphone.

A similar technology to INOV is Battery Saver Technologies.

Smartphones that support Xiaomi Quick Charge

Unfortunately, not all Xiaomi phones support the fast charging option.

Quick Charge Version 1.0:

Xiaomi Redmi Note Prime;

Quick Charge 2.0 version:

Xiaomi Redmi 5;
Xiaomi Redmi 4x;
Xiaomi Mi Note;
Almost the entire Mi line.

Quick Charge 3.0 version:

Mi Note 3;
Xiaomi Mi Mix 2;
Xiaomi Mi Mix;
Xiaomi Mi Max;
Xiaomi Mi Max 2;
Xiaomi Mi 6.

Quick Charge 4.0 version:

Already installed on: Xiaomi Mi 8;
Probably will be installed on: Xiaomi Mi 7, Mi Note 3 Plus, Mi 6 Plus.

Full list of models:

Some users of the Xiaomi a1 smartphone, after updating the firmware to Android Oreo, thought that new version The firmware supports Quick Charge 3.0, since when the phone is charging, the saying “Fast charging” appears. However, this is a misconception. Testing attempts have proven the opposite, which indicates the absence of a fast charging function on the Xiaomi a1 phone.

If your phone model is not in the list, you will not be able to add/purchase Xiaomi Redmi fast charger.

How to enable fast charging on Xiaomi

In order to activate the fast charging function on a Xiaomi smartphone, you do not need to go into the settings or use the help of a PC.

Xiaomi phones either they have this opportunity right away or they don’t. Quick Charge is located in the power pack itself.

To make sure that your smartphone is equipped with this option, inspect the unit. It should contain data on current (A) and voltage (V). If these parameters, when multiplied, give a power above 10 Watts (while conventional chargers absorb only about 4.5 Watts), and the fast charging icon is visible, this is indeed a Xiaomi fast charging cable, and you are the happy owner of a smartphone with this function.

Is it worth using a power supply that has a fast charging function with regular phones?

If your smartphone is not in the above lists, it means it is not equipped to charge the battery in a short time. And an attempt to do this using a much earlier released phone with special block Quick Charge can lead to overvoltage, fire, or damage to the gadget - it will simply stop turning on.

Does using this function affect the smartphone itself or the battery?

There are a lot of scary opinions about Quick Charge:

The fast charging option also works in the opposite direction - it absorbs battery power faster;
Damages the battery and causes it to wear out faster;
It is impossible or dangerous to charge your phone using Quick Charge if it is turned off.

All of the above does not have any substantiated arguments and are myths. Moreover, a huge number of people are working on the development of fast charging functions, and many tests and experiments have been carried out to prove that the phone and its battery are completely safe when using Quick Charge or using other innovations in this industry.

The only thing you should avoid when recharging the phone in this case is thick, dense cases and any objects located on the phone itself (pillows, clothes, blankets), as this can also lead to excessive heating or overvoltage.

Fast charging function does not work

There are several reasons why Quick Charge refuses to work:

First of all, the phone will not charge when relying on this function due to the initial lack of such an option. If this option is important for you, when purchasing a phone, check with your consultant in advance about its availability in the selected model. As mentioned earlier, just buy more later Charger with this function and putting it into use does not bring anything good.
If your phone is included in the list of models with Quick Charge, but fast charging still does not occur, make sure that you are using an original Xiaomi power supply. Don't forget to also find the necessary data about power, current and voltage.
Not updated firmware. Some Xiaomi smartphone models, even those with the ability to charge the phone using Quick Charge, must be updated to the latest version.
The fast charging option may be disabled if the phone is fully used while powered, or if there are foreign objects on it;
Problems with the firmware or with the phone itself.

What not to do while charging

Many of the myths mentioned above are born from the incorrect use of the fast charging function.

To avoid experiencing similar battery failures in the future, you need to be able to properly handle Quick Charge technology.

When using this function, pay attention to the following:

Using the phone while powered (especially excessively) can lead to overheating, as mentioned earlier, and disrupt working together telephone with power supply;
Charging the phone only at maximum power - if you constantly charge the phone only at the expense of this very maximum power, which arrives in a fairly short time, and by half, the operation of the fast charging function may also be disrupted and will soon wear out, so resort to using this function only if necessary.

#Qualcomm_Quick_Charge #MediaTek_Pump_Express #ASUS_BoostMaster #Samsung_Adaptive_Fast_Charging #Motorola_TurboPower #mCharge #Dash_Charge

Fast charging (Quick Charge) is a technology that increases the standard USB specification voltage and current at the output of the power supply to speed up charging the battery of a phone or tablet. Fast charging modes vary depending on the technology. Fast charging support is implemented in smartphones and Samsung tablets Galaxy ASUS ZenFone, Google NEXUS and a certain number of other devices.

As you know, a standard USB 2.0 port supports powering devices up to 2.5 W (5 V and 0.5 A). In turn, the USB 3.0 port can provide power to devices with a power of 4.5 W (5 V and 0.9 A). At one time, Apple set the trend for charging from more powerful power supplies - the first generation iPad required, that is, 5 V and 2 A. When connected to a regular USB port iPad computer didn't even show that charging had started. Charging, of course, was going on, but so slowly that it was impossible to charge the tablet even in a whole day.

Today, most smartphones can charge from 5-watt USB chargers, and tablets can use up to 2.1 A from a 5-volt charger. How many Amperes to take from the USB port of the charger is decided by the battery controller of the smartphone or tablet, so it is quite safe to connect the smartphone to a 5 V / 2 A charger - the controller uses as much current as is needed for charging.

So, to charge quickly modern gadgets, like a smartphone or tablet, well-known manufacturers mobile platforms developed special technologies.
Qualcomm has already presented the fourth version of the technology Quick Charge 4, and MediaTek, in turn, presented two specifications Pump Express and Pump Express Plus.

The point of these technologies is to charge the battery of a smartphone or tablet as quickly, efficiently and safely as possible. To support each technology, the mobile device, including the battery controller, must be compatible with it. Of course, you need a certified charger that can “speak the same language” with the battery controller of your smartphone or tablet.

Each of these technologies uses the same techniques - either increasing the current, or increasing the voltage, or both. Qualcomm became a pioneer in fast charging - the technology was presented in February 2013 Quick Charge 1.0. Devices supporting this technology can be charged at 5 Volts and use 2 Amps. As you can imagine, tablets with Quick Charge support began to charge as quickly as the iPad, and smartphones - almost twice as fast as others.

Next generation Quick Charge 2.0 made it possible to use increased voltage for charging up to 12 volts. More precisely, for QC 2.0 you can choose from three fixed voltages: 5 V, 9 V and 12 V (optional, 20 V chargers are also available). At the same time, the maximum power of the power supply can reach 18 W.

Quick Charge 3.0 appeared in devices based on Qualcomm Snapdragon 820, 620, 618, 617, 430 and newer processors. It is characterized by increased efficiency and intelligence. A compatible charger can dynamically change voltage from 3.2 V to 20 V in 200 millivolt increments. The current strength also changes dynamically. Moreover, changes in the power supply configuration continue during the charging process - the current decreases as the battery is charged in order to save its resource. In particular, because of this, the last 20-30% of charging occurs noticeably slower. The power of Quick Charge 3.0 power supplies remains the same - 18 W maximum, but charges gadgets a little faster due to better optimization of the process.

As you can see, the advantages of the technology are obvious - according to the manufacturer, in 30 minutes you can charge your smartphone by more than half. More precise figures are as follows: a 3300 mAh battery was charged to 60% in 30 minutes. Impressive result, isn't it? In addition, the manufacturer claims that Quick Charge 3.0 works twice as fast as the first generation Quick Charge, which is generally logical. We also note that all three generations of technology are backward compatible, that is, a power supply of any generation will be able to quickly charge a device of any generation. Of course, the first generation power supply will not be able to charge as quickly as a power supply that supports QC 3.0.

With the announcement of the Qualcomm Snapdragon 835 processor, information also appeared about Quick Charge 4.0. 20% faster and 30% more efficient. Capable of giving 5 hours of work in 5 minutes of charging.

Note that the technology implemented in chargers is not at all demanding on the type of cable - you can use regular cables USB Type micro B, USB Type C or cables with a proprietary connector from the gadget manufacturer. It should also be noted that fast charging is only fast up to approximately 80% charge. And it will take a long time to charge the battery to 100%, to avoid damage to the battery.

Regarding fast charging technologies MediaTek Pump Express and Pump Express Plus- Little is known about her. More precisely, there are very few smartphones and tablets, as well as chargers themselves, that support this technology. The essence does not change from this. Pump Express allows you to charge devices using a voltage of 3.6 - 5 Volts and with a charging current of no more than 2 Amps. That is, this technology is designed to compete with Quick Charge 1.0. In turn, Pump Express Plus allows you to use various voltages of 5 - 7 Volts, 9 Volts and 12 Volts, and the output current can reach 3 Amperes. True, MediaTek says nothing about 5 Volts and 3 Amps. But there is a mention of 9 V and 1.67 A (15 W), as well as the most powerful block power supply 12 V and 2 A (24 W).

* - The list is for informational purposes only. Exact list compatible devices no, details may appear.

There are other USB fast charging technologies, for example. The technology allows you to charge devices under a voltage of 9 Volts with a current of 2 Amps. An 18-watt charger, in particular, is included in the delivery package of some ASUS smartphones ZenFone 2.
At Samsung, similar technology for TOP smartphones Galaxy Note 4, Galaxy Note Edge, Galaxy S6, Galaxy S7, Galaxy S6 active, Galaxy S6 edge, Galaxy S7 edge, Galaxy S6 edge+ and Galaxy Note 5 named and released a special charger. It can produce a voltage of 5 or 9 Volts and a current of 2 or 1.67 Amps, respectively.

In general, given that the “normal” voltage for USB devices is 5 Volts, it looks quite logical when some smartphones that support USB fast charging technology are equipped with chargers with characteristics of 5 Volts and 3 Amperes. For example, such chargers can be found bundled with and from LG.

Knowing that there are a huge number of and, some of which are capable of delivering up to 2.4 Amps per USB port, it is difficult to convince yourself of the need to purchase expensive certified chargers. After all, it is obvious that smartphones and tablets that support fast charging technologies will independently take all the necessary and available charging current from the USB port, and accordingly, they can charge faster than from a standard charger with more modest characteristics. The conclusion, of course, is theoretical, and therefore does not claim to be the absolute truth.
We add that the specification of the new connector and cable assumes the ability to use a maximum current of 5 Amps per connector and 3 Amps per standard cable. In theory, at 20 Volts you can reach 100 W - excessive for the vast majority of smartphones and tablets. In practice, we will see the implementation of all kinds of fast charging functions (including those described above) using a standard USB cable Type C, as well as expanding the range of USB chargers with increased strength current at the output.

One of the most current problems problems that every owner faces mobile devices, such as smartphones and tablets, along with increasing their battery life, is reducing the time we have to spend recharging their batteries.

Many owners of devices based on Qualcomm processors have heard about their built-in support for proprietary Quick Charge technology, which is designed specifically for these purposes. Latest version Quick Charge 2.0, which will be discussed below, allows you to charge the battery of these tablets and smartphones 75% faster than conventional devices.

For example, with the Rapid Charge 2.0 charger, you can charge your device's battery to 60 percent in just 30 minutes.

How does it work? First of all, in order to understand how we can speed up the charging process of the batteries of our tablets and smartphones, you need to know that they are charged using the current supplied to them from an external power source.

It is the current, not the voltage, that is the main factor in ensuring the battery is charged. Therefore, the higher the current supplied to the battery by the power source, the faster it will charge.

Increasing the charging current requires the use of more powerful power supplies, as well as increased demands on other components involved in this process.

This means that we cannot increase the power of the power source indefinitely: not only are there maximum current values that a smartphone or tablet battery can withstand without overheating, in addition, there is a limit that is determined by the amount of current that the same one can pass through Micro USB connector.

If the first problem is solved due to the fact that all our smartphones and tablets have a built-in current regulator, which is designed to limit it to a battery-safe level, then the second can be solved by replacing conventional Micro USB 2.0 ports with more powerful ones of the Micro USB 3.0 standard.

Now let's return to Qualcomm's Quick Charge technology. The first version of Quick Charge 1.0 made it possible to increase the charging current to the maximum possible value for the Micro USB connector, which was 2 amperes, which allowed the use of up to 10 W of power (with a 5 volt power source: 5x2 = 10).

Quick Charge 2.0 technology allows you to increase the power delivered by the charger to the battery to a maximum of 36 W. Those familiar with electrics will tell you that using a standard 5-volt charger this is not possible, since a current of 7.2 amps must flow through the Micro USB connector. How can you get around this limitation?

The fact is that in this case, Qualcomm technology involves the use of power supplies with an output voltage of not only the standard 5 volts, but also 9, and even 12:

Thus, in addition to supporting Quick Charge 2.0 technology on your tablet and smartphone, in order to speed up the charging time of their batteries, you will also need a special power source ( network adapter), which comes with it.

At the same time, all chargers that support Quick Charge 2.0 are universal. For example, you can use the Motorola Turbo Charger to charge HTC devices, and the HTC Rapid Charger 2.0 to charge Motorola smartphones.

(Quick Charge), so users actively use this useful technology. QC allows you to quickly and efficiently charge your smartphone; in just an hour, the battery charge is 100% again. For our readers, we have prepared material that will help you learn everything about Quick Charge 3.0 and how it works.

Quick Charge

Qualcomm Technologies continues to introduce new innovations to the mobile device market. At one time, Quick Charge 1.0 technology clearly demonstrated that smartphones can charge 40% faster than with conventional charging.

A year later, QC 2.0 was introduced, allowing the device to be charged 75% faster. In addition, various accessories compatible with this technology were presented.

In 2015, Qualcomm Technologies continues to develop its industry. Quick Charge 3.0 charges even faster and more efficiently. By the end of 2017, Xiaomi has already released more than 10 smartphone models that support QC 3.0

With Quick Charge technology, more than high level current, thus charging becomes as fast as possible.

For successful charging, the device and the charger itself must be compatible with the same voltage and current.

For example, if the phone supports a 9V/2A charger, but it charges with a 1A charger, the process will take much longer.

Another example, if a charger with a specified current of 2A is used to charge a smartphone that supports a maximum of 0.7A, this will not make it charge faster.

The phone can also be charged faster if a similar charger is used, but with a higher current.

Note: products without a certificate are not guaranteed declared effectiveness.

How does Quick Charge technology work?

Quick Charge technology allows you to optimize the energy supply to your smartphone battery during the first stages of charging.

Thus, some phones can be charged up to 80% in just half an hour. However, in the final stages of charging, the energy transfer is not as high, regardless of which charging technology is used.

Consequently, the battery can be charged up to 50% in a short amount of time, but you will still have to wait more than an hour to fully charge the smartphone.

QC 3.0 charges mobile devices 4 times faster. Compared to QC 2, charging speed has increased by almost forty percent.

Qualcomm focuses consumers' attention not on increased charging speeds, but on increased efficiency. Thus, the main innovation in the technology is the INOV function, which is capable of intelligently selecting the required voltage, more accurately optimizing the power and charging time of a particular device.

Differences between QC 3.0 and previous versions

To understand the main differences latest version quick charge technologies from previous ones, just look at the table below:

After reviewing, we can conclude that due to the increased voltage, the charging time of devices decreased from version to version. The maximum power in the third version remained almost the same as in the second - 18 W. At the same time, batteries with low voltage get higher power. Thanks to this, they charge much faster.

Why doesn't my phone support fast charging? This is exactly the question most often asked by owners of smartphones that do not support Quick Charge. For example, owners of a new smartphone running stock Android would be very disappointed by the lack of Quick Charge in the device.

The problem is that Qualcomm's technology is proprietary. And its support depends on the model of the installed processor. These are the nuances that developers take into account when releasing a new smartphone.

According to the instructions from the Qualcomm website, they do not prohibit the use of certified adapters on phones without fast charging. Yes, your smartphone will charge properly, but you won't be able to experience all the benefits of Quick Charge when charging your device.

Conclusion

The Quick Change function is quite promising and in demand. The developers are not sitting idly by, but are improving it, complementing the 4th generation of fast charging technology with new functions.

Users will be pleasantly surprised by the new Xiaomi smartphones with support for Quick Change 4.0, the presentation of which is expected in the first quarter of 2018.