So far, there are no compact batteries with high capacity. Similar devices are under development. Of course, there are some prototypes, but they are not used. Smartphone manufacturers went the other way - they came up with a way to charge the phone faster, and much more. To do this, it must support fast charging technology (it can be called differently) and be equipped with a special charger that can provide high amperage.
Note that cheap phones in the price category up to 10 thousand rubles do not have such a function. Fast charging is available in flagships and more or less expensive smartphones, which can not be attributed to either flagships or state employees. However, the hardware is improving and getting cheaper, therefore, if during the year 2018 budget workers start producing with fast charging technologies, then this will be logical.
How does fast charging work?
To fill the battery faster, you need a high power charger. In standard models, the voltage does not exceed 5 V, and the current strength is not higher than 2-2.5 A (most often it is 1 Ampere). In special adapters, the current can reach 5 A, and the voltage is 20 V. However, this is not the main difference. The classic “slow” charges simply provide a stable serial current, while smart and fast devices can “communicate” with a smartphone through a special protocol.
For example, the popular Quick Charge 3.0 technology from Qualcomm, a well-known processor manufacturer, is based on “communication” between a smartphone and a charger. The phone sends charging information about the state of the battery, and based on this information, the power supply can adjust the output power by changing the current or voltage. Such a voltage detection system is called Intelligent Negotiation for Optimum Voltage or INOV.
The highest power is provided by the adapter with an empty battery. That is why manufacturers most often indicate the efficiency of their charges for battery filling time up to 50%. For example, with a completely empty Quick Charge 3.0 battery (the name of one of the technologies), an initial voltage of 20 V is created, and then, as the battery capacity increases, the voltage can drop down to 3.2 V.
The fast charge function is available only with the support of the processor of this technology and with a special charger, which is usually supplied by the manufacturer. If it breaks, then you can buy a new one, but it must be certified. And although there are few fakes on the market, you can’t use an unverified accessory in any case, because charging the battery in the wrong mode can not only destroy the smartphone, but also cause a fire.
Technology
Each self-respecting manufacturer of chipsets (processors) has created its own unique technology for fast charging. We indicate the most common of them.
Quick charge
Qualcomm is a leading smartphone chipset manufacturer. Xiaomi, some Samsung, Asus, Google Pixel and other manufacturers purchase chips of this brand and successfully use them in manufactured phones. Qualcomm was the first to create fast charging technology. The latest processors currently use Quick Charge 3.0. It is supported by Qualcomm Snapdragon 835 (last) chips 821, 820, 625, 620, 618, 617, 430. Processors starting from 625 can be used even in budget smartphones.
Quick Charge 3.0 technology allows you to fully charge a 3300 mAh battery from scratch in 96 minutes. This is a great result. Qualcomm also announced that the fourth version of the standard will be implemented in 2017, but 2017 is drawing to a close, and the latest Snapdragon 835 processor has received only the third version. It is it that is used in phones based on this chipset.
Pump express
Qualcomm's closest competitor is MediaTek, which also manufactures processors for phones. However, its products are most often used in budget Chinese phones such as Meizu. Its proprietary Pump Express 3.0 fast charging technology (latest version at the moment) allows you to fully charge your Meizu Pro 6 smartphone with 2560 mAh batteries in just 1 hour.
Support for the technology is possible only if there is a USB Type-C port and one of the supported SoC (the company does not disclose the entire list).
Adaptive fast charging
Samsung is also not far behind. Adaptive Fast Charging technology is implemented in Exynos processors. It is supported by all S series phones starting with the Samsung Galaxy S6. The Note line also got a new development - all smartphones, starting with the Galaxy Note 4, support it. Samsung's charging power is 15 W at 9 V, which is enough filling the battery with a capacity of 3000 mAh to 50% for 30 minutes.
What about Apple?
For the first time in iPhones, a quick charge appeared just the other day. Apple has implemented the technology in the new flagship iPhone 8, iPhone 8 Plus and iPhone X. During the presentation, it was announced that the phone could charge up to 50% within 30 minutes. However, buyers are disappointed - Apple does not ship special adapters. A standard 5W plug that does not support technology comes standard in the kit. Therefore, in order to be able to quickly charge the phone, you will have to buy a charger with a power of 29, 61 or 87 watts. And although they say that for the iPhone 8, charging with a power of 61 watts is necessary, all this is complete nonsense. The maximum current that any of the new flagships can pick up can provide a 29W charger.
Other technology
There are other manufacturers who have created their technology. We will indicate them briefly so as not to bore you much:
- OPPO implements Flash Charging or Dash Charge technology in its phones.
- Huawei does not stand by with its HiSilicon processors with Super Charge technology. Huawei Mate 9, P10 and P10 Plus so far have this technology, but the list will expand.
- Meizu is working on the revolutionary Super mCharge technology, which in theory will be able to charge a 3000 mAh battery in just 20 minutes.
So far, these are all currently known fast charging technologies that are used in various phones. Their principle is approximately the same, but there may be technical differences.
Conclusion
In the end, I would like to give valuable advice. If the processor manufacturer’s website indicates that the chip supports fast charging technology, this does not mean that this technology will be used in a smartphone with this chip. The chipset developer only provides such an opportunity, and the smartphone manufacturer decides whether to include it in the model’s functionality or not.
Also, when buying a power supply, you need to check which fast charging standards it supports and whether it matches the smartphone. Not all fast chargers are universal, and many of them are not able to charge phones with other SoCs.
Send an answer
Greetings, everyone knows why fast charging is needed for smartphones, we constantly consume content, communicate in messengers and social networks, and even make phone calls. With the increase in diagonal and screen resolution, the load on the battery also increased. We are already short of 5V 2A. We freak out when smartphones charge for 2 hours. Therefore, manufacturers have adopted Fast Charge, but many users have many questions to this technology.
For example, how harmful is fast charging to the battery? Is it true that smartphones can explode due to increased current? Is there a difference between Mediatek Pump Express and Qualcomm Quick Charge? And how does fast charging work in principle? These and many other questions are answered by this article.
Asus boost master
Today there are a huge number of standards for fast charging. Even Chinese brands, such as Leagoo and Oukitel, are trying to defraud some non-standard. So what to speak of famous brands. Huawei has its own Super Charge with a maximum power of 22.5 watts. Asus Boost Master allows you to charge the device at a voltage of 9V with a current of 2A. Samsung has developed a similar technology Adaptive Fast Charging, it can produce a voltage of 5 or 9V and a current of 2 or 1.67A, respectively. The most interesting technologies will be described below, but for now let's look at how fast charging works in general.
Any quick charge is based on a very simple principle of increasing the current transmitted to the battery. But, the increase in power in each of these technologies is achieved in different ways. Somewhere by increasing the voltage, up to 20V. And somewhere they increase the current strength to 5-6A. And somewhere, they simply combine raising the voltage and current strength.
All fast charging technologies include a smart controller, most often it is built into the processor, as well as a special charger that can produce the necessary current. Well, sometimes you need a special cable that can pass increased current. But the main question for today is, is fast charging harmful to batteries?
The situation is frankly not ambiguous. There are a number of studies that prove the negative impact of fast charging on the battery. But there are also studies that completely refute this. Since it is not clear who is right and who is wrong, I propose to sort this out on my own.
By and large, modern lithium-ion and lithium-polymer batteries absolutely no matter what current strength and voltage they will be charged. For example, take the same laptops, they have all the same lithium-ion batteries, only more.
Therefore, I consider the panic unjustified. But is it true that smartphones can explode from fast charging? The most disastrous effect on the battery is provided by heating, it is he who kills the battery and reduces its capacity.
Overheating is the main cause of battery fires and explosions. All modern Fast Charge technologies are equipped with a huge number of overheat protection systems.
But why do we regularly see on the network more and more photos of burned devices? Because no system can protect the gadget from user exposure. Which charges the device with anything and anyhow.
Therefore, never save on chargers and cables. Always charge your smartphone with an original charger and cable. Do not charge a damaged device. If the smartphone case is bent, cracked or broken, it is better not to risk it and not use such a device at all. Never leave a charging smartphone under the pillow, in a thick case or in a bag.
The second important reason for the breakdown of gadgets is poor-quality components or marriage. If you buy a phone for 50 bucks, then it’s stupid to hope that it has a good battery. Most likely, a similar battery is made of low-quality materials. But there are flaws in A-brands. Just remember all the jokes about exploding Samsung Galaxy Note 7.
Best fast charge technology
Well, now for fastening and visualization, let's look at the three most promising and interesting, in my opinion, fast-charging technologies. These are Qualcomm Quick Charge, Mediatek's slightly less common Pump Express and VOOC Flash Charge technology found only on OPPO devices.
Progressive VOOC Flash Charge by OPPO
Let's start with the less familiar VOOC Flash Charge. This, although less common, but the most interesting is the fastest and most gentle technology. At the moment, OPPO has introduced the second version of this technology. It allows you to fully charge the battery at 2500mAh in 15 minutes, and in 5 minutes you can recharge the battery by 45%. In this case, the smartphone is charged with a completely standard voltage of 5V, which does not heat up the battery.
These record results were obtained through the use of special batteries that can withstand current up to 4.5A, which is almost 2 times more than in a standard charge. Batteries have 8 contacts at once and are divided into several cells that are charged in parallel. They say that OPPO transferred the technology and it tried to develop its version of Dash Charge based on VOOC Flash Charge.
The next quick charge is the Mediatek Pump Express. It is not heavily dependent on the specific batteries and materials from which the connectors and cables are made.
The current Pump Express 3.0 technology charges the battery from 0 to 70% in just 20 minutes. The technology uses a current of 3V with a power of more than 5A. With Pump Express, you can charge the battery directly, bypassing the intermediate circuits and without affecting the standard built-in charging circuit.
But this option is only possible when using the USB Type-C connector, because it can greatly reduce energy leakage and reduce heat. To protect against overheating, 20 built-in protection systems are provided.
The first processor to support Pump Express 3.0 is the Helio P20. It is stated that subsequent chipsets will also receive support for this standard. Mediatek sells its processors in cars and, in theory, Pump Express should be found in every smartphone on Mediateke, but in practice this is not so. Because the processor supports fast charging, but the manufacturer does not realize this opportunity, because it does not want to turn around with the power supply wiring for the needs of Pump Express and thereby increase the cost of the device.
Perhaps manufacturers are simply worried about the safety of batteries, which are far from always of high quality. Of the smartphones that support fast charging from Mediatek, you can only recall Ulefone Power, Uhans H5000 and Vernee Apollo Lite.
Qualcomm has achieved the greatest success in the fast-charging field. The development of Quick Charge technology has been ongoing for four generations and brought to the ideal. All versions of the standard are backward compatible, that is, you can use the version 4 charger with a phone that supports only the first version.
In this case, the charger will switch to Quick Charge 1.0 mode. Qualcomm’s standard supports a large number of smartphone and accessory manufacturers. For example, Samsung retains support for Quick Charge. Despite the fact that it has its own development.
Qualcomm introduced the first version of the standard back in 2013. Since then, the implementation of Quick Charge has not changed much. Integration into mobile devices is carried out by means of a separate microcircuit or together with the Snapdragon chip and a special adapter, which can produce a stronger current.
With each new version of the Quick Charge standard it’s faster, smarter and safer. For example, the first generation could charge devices with a voltage of 5V and a current of 2-2.5A. The second generation allowed the use of increased voltage up to 12V, more precisely, the controller itself chose the required value from three fixed voltages of 5, 9 or 12V with a maximum current of 3A.
Moreover, in theory, the maximum power of the power supply can reach 18 watts. But with such power, heating problems began to appear sharply and already in the next versions, engineers paid attention to protecting the battery from overheating. The main innovation of Quick Charge 3.0 is not the increased charging speed, but the ability of the technology to save energy, avoiding excessive heat generation.
To implement this approach, the new iKnow technology, that is, smartly determining the optimal voltage, allowed. Thanks to it, charging can “communicate” with the device, asking it for the required voltage, which can be any in the range from 3.2V to 20V with a step of 200mV.
Thus, Quick Charge 3.0 allows you to dynamically tune to the desired voltage. As the battery charges or the controller heats up, the required amperage gradually decreases.
Including for this reason, the last 20% charge longer. As a result, charging takes place very carefully, the battery does not overheat, and its wear is minimized.
Already this year, a device with support for Quick Charge 4.0 will enter the market. This technology is implemented in the Snapdragon 835 chip. The new standard adds several degrees of protection against overheating. There is a built-in cable quality control system that will prevent the device from charging from poor-quality or damaged wires.
Well, that’s all we have for today. What awaits us in the future? Of course, I want to believe that in the future all smartphone batteries will be based on graphene. Such batteries can boast the properties of super capacitors. And it takes a few minutes to charge them.
They are much cooler than modern lithium-ion batteries and do not lose their capacity even after 2,000 charge cycles and have a higher energy storage density. Perhaps in the very near future, after 7 or 10 years, we will completely switch to them. Because there are already working prototypes.
But what I personally expect the most is microscopic batteries based on radioactive elements, they will not need to be charged at all, just replaced every new year. But for the full implementation of this technology for a very, very long time.
The uptime of a modern smartphone is a stumbling block for all manufacturers. You can endlessly increase the power of the chipset, display resolution, use the coolest camera, but all these advantages do not matter if the device lives on for half a day. The obvious solution is to increase the capacity and quality of the batteries, but the first is limited by the body of the smartphone, and the second by modern technologies.
As a result, companies came up with a third, no less elegant way out of this situation: if you can’t come up with a smartphone that will run on battery power for a week, then you can make it charge so fast that the operating time ceases to play a decisive role.
About technology
The main factor affecting the battery charge rate is the current supplied by the power source. The higher the current, the faster your smartphone will charge. However, it is impossible to endlessly and thoughtlessly raise the amperage, as this will entail the need to adapt the remaining components of the smartphone involved in charging. In addition, an increase in current will increase the heating of the housing.
Therefore, Qualcomm decided to charge smartphones not with current, but with a higher voltage. To do this, the power was increased to 10 W, the current to 2 A, and the voltage was 5 V. The charging speed with this approach increased by 40%. In the second generation, Quick Charge learned to use voltage of 9 and 12 V, this allowed to increase power up to 36 W and slightly increase the charging speed.
The main difference between Quick Charge 3.0 is a significant reduction in the heating of the case and charger. This is achieved thanks to the technology Intelligent Negotiation for Optimum Voltage (INOV), it allows you to adjust the voltage in steps of 200 mV in the range from 3.6 to 20 V.
A point change in voltage depending on the current charge of the battery made it possible not to overheat the case, while the charging time was further reduced. So, Qualcomm promise to charge the smartphone by 80% in 35 minutes. And that completely changes habits when using a smartphone. Let's talk about this in more detail.
Use cases
Now most smartphones live one working day without charging with average use. As soon as you switch to a more intensive mode (games, for example, or active web surfing in LTE), this time is perfectly reduced to half a day. And then there are three possible options.
In the first case, you turn on the power saving mode and try not to touch the smartphone until the evening, which, you see, is not very convenient.
The second option is to use an external battery. In this case, you must either leave the smartphone alone for an hour or two, or reconcile with the fact that a long wire will stick out of it, leading to an external battery. A side disadvantage of this decision is the need to carry such a "power bank", which also weighs like a smartphone itself.
Fast charging is an excellent alternative to the two scenarios above. Finding a free charge for half an hour will not be difficult, especially if you are sitting in a cafe. We connect the smartphone, drink a cup of coffee and get an almost fully charged battery, and then we use the phone in everyday mode.
Purchase
But why buy such a charger if, in theory, it should come with a smartphone? Unfortunately, even large manufacturers often save on this trifle and put a regular power supply in the box, although Quick Charge 3.0 is displayed on the package. But even if the smartphone is equipped with an appropriate charger, it usually lies at home, and another one is needed on the road.
And here the question arises: which power supply to choose? On the one hand, there are expensive solutions from large manufacturers for two thousand or more, but, on the contrary, there are cheap offers from various little-known companies. I don’t want to overpay for the brand, but trusting the charging of a noname company’s smartphone is also scary.
A good alternative to both solutions is the choice of a well-known Chinese company that has long been operating in Russia, but having affordable prices. For example, power supplies with Quick Charge 3.0 are manufactured by Ainy, a company known to many users for its Asahi Glass safety glasses.
All Ainy accessories are tested and rejected at a warehouse in Shenzhen. Therefore, at a relatively low price (only 800 rubles), their chargers are of the quality of large manufacturers.
Conclusion
If your smartphone supports Quick Charge 3.0 fast charging, but the kit did not have a corresponding power supply, or you want to have another charger for trips, then it makes sense to look at the chargers from Ainy. Get the opportunity to charge your smartphone by 80% in half an hour for just 800 rubles - this is a great offer.
PV smartphones in 2019, based on Qualcomm's top-end mobile processors, will see fast charging using Quick Charge.0 technology, even faster and more efficient. The power of the adapter will be 32 watts, which is two times more than the previous version.
The first chip with Qualcomm Quick Charge.0 support should be the one that will become the “brain” of several potential hits of the next year on the mobile phone market: Samsung Galaxy S10 (along with its own processor of the Exynos series), Xiaomi Mi9 and OnePlus 7.
Note that the mere mention of Quick Charge.0 in the specification of the smartphone chipset does not mean at all that the latter will support it. The fact is that Qualcomm's fast charging technology is licensed. And the newer the version, the more expensive it is to use. But there are other situations.
For example, the Galaxy Note 9 introduced in August was “familiar” only with the old Quick Charge 2.0, announced three years ago. This is due to the fact that Samsung releases its flagships on its own Exynos chips. Adaptive Fast Charging, supported by the latter, is noticeably inferior to QC 3.0.
Development timeline
Quick Charge 1.0
The very first version of Qualcomm’s fast charging technology. The power of the adapter was 10 W, the supply voltage was 5 V, and the current was 2 A. On the whole, it did not differ much from other solutions compatible with the USB Battery Charging specification. I didn’t have any special advantages and got little distribution.
Quick charge 2.0
The first really popular version. It provides for the exchange of data between a smartphone and a charger in order to determine whether it supports QC 2.0 or not. The main advantage was the use of USB cables that already existed at that time.
With this power supply voltage, it can be not only 5 V, but also 9, 12 and even 20. It is clear that if you supply this voltage just like that via USB, there is a high risk of burning the charging device. For this reason, the QC 2.0 specification provides the following principle of operation:
- When connected to a charger (hereinafter referred to as the charger), the device (smartphone, tablet, etc.) “sees” that the data lines are D + and D? (see diagram above) are closed, as required by USB Battery Charging. This state is called S1.
- A voltage of 0.6 V is applied to D +. State S2. If this does not happen, charging continues in Quick Charge 1.0 mode.
- If the memory supports Quick Charge 2.0, D + and D? Are disconnected. In this case, D? shorts to 0 V.
- The charging device, in response to this, supplies a voltage of 3.3 V to the freed D +. Status S3 is reached.
- Is there a release of D? from the memory. In response to D + and D? a control voltage combination is supplied, indicating the required supply voltage.
Possible combinations:
Despite such a seemingly elegant solution for managing the power supply voltage, Qualcomm’s fast-charging solutions were opposed by the USB-IF association, which standardizes and develops the USB interface, as well as Google.
The reason is that QC 2.0 does not fully comply with the USB Type-C specification. It provides for the presence of a special chip inside the cable that identifies the parameters of the cable. Its power is supplied from the main bus, and an increase in voltage can disable it.
Smartphones supporting Quick Charge 2.0 and USB Type-C could not get a USB-IF certificate of conformity. For this reason, for example, Samsung flagships up to and including the Galaxy S7 had an outdated MicroUSB 2.0 connector instead of the more modern Type-C.
Quick charge 3.0
In essence, this is the same QC 2.0 technology. However, it received in addition a regulated voltage mode. For him, at the design stage of the second version, a state was reserved in which a voltage of 0.6 V was applied to D + and 3.3 V to D-. The adjustment range was from 3.6 to 20 V with a step of 0.2 V.
Charger with support for Quick Charge 3.0 and standard USB Battery Charging
Like the second version, the third also met resistance from USB-IF. Google also did not recommend using QC 2.0 and 3.0 for Android devices. In turn, this resulted in the appearance of custom developments from manufacturers of mobile electronics. Examples: Huawei Super Charge, OnePlus Dash Charge and others.
Quick charge 4.0
The fourth version should resolve the differences. By default, a device that supports QC 4.0 tries to initialize the USB Power Delivery mode, as specified in the USB-IF requirements. Only then does he try to activate the classic Quick Charge 2.0 / 3.0 in the absence of its support.
According to Qualcomm, QC 4.0 technology allows you to charge a 2750 mAh battery in 15 minutes by as much as 50%. At the same time, only 5 minutes of charging is enough for 5 hours of operation. In general, this indicator depends on the nature and intensity of use.
The maximum power of the charger is 18 watts. At a supply voltage of 9 V, the charging current is 2 A, at 20 V - 0.9 A. At the same time, manufacturers of smartphones have created custom faster solutions. In their case, the adapter power can reach 40 watts, as in the latest version of Huawei's Super Charge.
Despite the fact that Quick Charge 4.0 supports even inexpensive mid-level Qualcomm chipsets like the Snapdragon 630 (SDM630), at the moment it is not very widespread. This is due to the fact that many vendors have already invested in the development of analogues, and with a rather high cost of a license.
Quick Charge. 0
In an effort to catch up with competitors, Qualcomm is developing a fifth more efficient version of its fast charging technology. It is designed to save vendors from developing their own "crutches." As already mentioned at the beginning, the power of the QC 5.0 memory has been increased to 36 watts.
In this case, the current is transmitted immediately through three channels. Something similar can already be seen in the case of some smartphones with
Articles and Lifehacks
The set of Quick Charge (QC) technologies for mobile devices quickly created by Qualcomm, an American chip maker, is such a useful thing that almost any smartphone owner has probably heard about it.
The ability to recharge the battery for more than half an hour is very attractive.
To date, the fourth version of Quick Charge is relevant today, which clearly indicates: the technology has taken root.
Why fast charging is possible
It would be more correct to put the question differently: why do ordinary chargers work so slowly.Each battery model has its own optimal mode, which allows, on the one hand, to avoid damage when the current is exceeded, and on the other hand, not to charge it too long.
But in reality, it is something averaged: the real values \u200b\u200bof current and voltage also depend on the degree of filling of the battery capacity.
With an increase in the performance level of the chipsets, it became possible to dynamically set the memory parameters depending on the current conditions.
Thanks to this, the developers were able to achieve impressive results: having accelerated the charging process at the initial and middle stage by several times due to the increase in voltage.
To do this, it was necessary to solve several technical problems.:
- Choose the optimal charging modes that do not shorten the battery life.
- Ensure reliable and safe transfer of sufficient power from the power source to the battery.
- Create hardware and software that allows you to finely control the state of the battery and manage the operation of the charger.
What is Qualcomm Quick Charge?
If we consider the first and last, fourth, generation of Quick Charge, it becomes clear that this technology has undergone dramatic changes in a short time.
The basis for it was originally the USB Battery Charging specification, created to standardize the increased energy consumption of mobile devices. It allowed “negotiating” the source and receiver about the necessary voltage parameters.
It is clear that for the operation of this system requires the support of the corresponding protocol as a chipset, and a charger.
The first generation was not very popular, so the mass distribution of technology began with Quick Charge 2.0, which appeared almost simultaneously with another specification - already “sharpened” specifically for fast charging.
But, unfortunately, Qualcomm technology, although it had a number of advantages over this standard, was not compatible with it.
The protocol used by INOV (Intelligent Negotiation for Optimum Voltage) technology provided the ability to "smartly" switch between voltage modes of 5, 9, 12 and 20 V. For devices that do not support QC, the default mode was 5 V.
If the presence of QC support was detected, then in the future the choice of mode was carried out by the chipset, depending on the state of the battery. Maximum power reached 18 watts.
The result was successful, and the new product almost became a trendsetter: on its basis appeared the standards of other companies, fully compatible with it: Samsung and developed by Lenovo, used in Motorola smartphones.
In 2016, a new version appeared - Quick Charge 3.0. The first flagship chipset supporting it was the famous Qualcomm Snapdragon 820.
Instead of several fixed modes, it provided for the possibility of discrete changes in voltage in steps of 200 mV.
As a result, it took only 96 minutes to fully charge the 3300 mAh battery installed on the top-end LG G6.
The current, fourth generation QC appeared along with the Snapdragon 835 chipset. Compared to the third generation, the charging speed increased by another 20%. But most importantly - now this standard is fully compatible with USB Power Delivery.
In addition, the Snapdragon 845 has its more advanced version 4.0+, which provides higher speed and efficiency.
Which devices have Quick Charge?
The minimum requirement is that the gadget has the appropriate type of chipset:
- For QC 1.0 - Snapdragon 600.
- For QC 2.0 - Snapdragon 200, 400, 410, 615, 800, 801, 805, 808, 810.
- For QC 3.0 - Snapdragon 821, 820, 620, 618, 617, 430.
- For QC 4.0 - Snapdragon 845, 835.
One of the most famous situations of this kind is OnePlus 3T, but in this case the refusal was justified, because there was its own, albeit losing QC.
But the release of Xiaomi Mi A1 on a “clean” version of Android without the MIUI branded shell, which did not have fast charging functions, fans of the brand greeted without any understanding.
Finally
Qualcomm Quick Charge can safely be considered the most advanced fast charging standard of all existing today. And although he did not become the only one, he looks very advantageous against the background of competitors.
And compatibility with the USB Power Delivery specification to some extent solved the problem of using non-native chargers.
Someone thinks that the future is with wireless chargers, someone is prettier than a USB Type-C in each outlet. But in any case, QC really makes life easier for gadget users, saving time.
And until they came up with a compact battery with a capacity of several tens of mAh, its relevance is not in doubt.
