Fast charging function quick charge 2.0. Qualcomm Quick Charge - what it is and how fast charging technology works. Testing Tools

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. Support for fast charging is implemented in smartphones and tablets Samsung Galaxy, ASUS ZenFone, Google NEXUS and a certain number of other devices.

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, in order to quickly charge modern gadgets, such as a smartphone or tablet, well-known mobile platform manufacturers have 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.

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.

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 USB Type micro B, USB Type C cables 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 power supply of 12 V and 2 A (24 W).

* - The list is for informational purposes only. There is no exact list of compatible devices, 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 of some ASUS ZenFone 2 smartphones.
Samsung has named and released a special charger for the 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. 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 seems quite logical that some smartphones that support USB fast charging technology are equipped with chargers with 5 Volt and 3 Ampere characteristics. 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 Type C cable, as well as an expansion of the range of USB chargers with increased output current.

Hi all!
I present to your attention a review of the “smart” charger
Briefly: it works, in some cases it charges really faster
More details under CAT

A little background on the “purchase”:
Since I am an author related to online shopping reviews, managers of various stores periodically contact me in order to “push” something that the store is currently betting on.
This time, the “smart” charger Tronsmart Quick Charge 2.0 18W turned out to be “shoved through”, which, according to the manufacturer, should charge batteries 75% faster

As a result of laboratory tests using a 3300mAh battery, it was found that the Tronsmart 2.0 charger charges it to 60% in 30 minutes, while when using a conventional charger (5 volts, 1 ampere) the battery was charged by 12% in the same time .

✔ Declared characteristics

✔ Delivery

✔ Packaging and appearance

✔Testing

List of devices that support Quick Charge

Samsung Galaxy S6,Samsung Galaxy S6 Edge,Samsung Galaxy Note 4,Samsung GALAXY Note Edge
LG G4,LG G3,LG G2, LG G Flex2, LG G Pro 2, LG Optimus G Pro
Sony Xperia Z3,Z4, Sony Xperia Z3 Tablet, Z4 Tablet, Sony z5, Sony z5 premium,Sony z5 compact
Sharp Aquos Pad,Sharp Aquos Zeta,Sharp SH01G/02G
HTC One M9, HTC One (M8), HTC One mini
Motorola Droid Turbo,Motorola Moto X,MOTO x pure
Xiaomi Mi3, Mi4, Mi Note
Asus Zenfone 2, Asus Transformer T100.Zenfone 2 deluxe
Google Nexus 6
Fujitsu F-05F,Fujitsu F-03G, Fujitsu F-02G ,Fujitsu Arrows NX

Now “test with an average smartphone.” In the same half hour, the old Jiayu G2 absorbed 310 mAh from the “smart” charger, and, oddly enough, 340 mAh from the regular one.

With smartphones that do not support fast charging technology, miracles will not happen - the charging time will be comparable to the charging time from a regular good 2A charger.
The maximum current that I was able to see on the tester was 2A. During operation, the device does not make any sounds, heats up slightly, and phantom clicks do not appear on charging devices.

I wanted to show the insides, but the assembly was too good, no matter how much I picked, I couldn’t gut it...


Unboxing video:

The product was provided for writing a review by the store. The review was published in accordance with clause 18 of the Site Rules.

Qualcomm Quick Charge is a technology from a well-known manufacturer of mobile processors that allows you to speed up charging your gadget’s battery. If you've recently purchased a new smartphone, there's a good chance that the included power supply already comes with QC and is capable of charging your phone significantly faster than any other chargers you have in your arsenal. This little piece of magic is called Quick Charge by , and it's a two-step process that promises to charge your phone quickly and, most importantly, without sacrificing battery life.

Quick Charge 2.0

Quick Charge 2.0 is one of Qualcomm's first technologies, which the company describes as a "full suite of power management technologies" for charging your device using a regular micro USB cable. For such charging to work, the company puts forward two main requirements for Quick Charge 2.0:

• smartphone or tablet with a Snapdragon processor on board
• power supply with support for Quick Charge 2.0

Because this is a two-step process, both the power supply and the phone or tablet must be licensed and certified by Qualcomm to function properly. Since almost every new smartphone that offers Quick Charge 2.0 ships with a compatible power supply, users almost always have what they need to take advantage of this technology out of the box.

Manufacturer pays for license to use QC

There are also some smartphones on sale with Snapdragon processors, where the manufacturer refused to pay for the license to use Quick Charge 2.0. A striking example of this is OnePlus and their OnePlus 3T smartphone, which uses its own fast charging Dash Charge. So be sure to check the specifications on your next device to be absolutely sure it supports QC.

The main part of the technology is hidden, of course, in the power supply; a smaller part falls on the processor, namely voltage and current control. Today, almost all chargers offer 10 Watts of power, or 5V/2A out of the box, which significantly speeds up the charging of most smartphones and tablets. Qualcomm's Quick Charge technology allows for multiple charging options for your device, and they come in different shapes and sizes.

The technology works as follows: it recognizes the current battery status and intelligently regulates power to your device. As a result, your phone won't charge as quickly from 70 to 100 percent as it will from 0 to 60 percent. That's why every Quick Charge update boasts the ability to quickly go from 0% to 50% charge in just 30 minutes. This is designed to regulate power and prevent high voltage and current from damaging your smartphone battery.

The biggest question surrounding this technology is the issue of battery life, in particular Does Quick Charge affect battery life? in your device. Typically, slower charging allows your battery to function for a longer time than fast charging the battery. A side effect of higher charging rates is that the case will heat up, and high temperatures almost always have a negative effect on electronics. However, there is no evidence yet to support battery degradation associated with continuous use of Qualcomm QC fast charging.

Considering that the average life of a smartphone is 1.5-2 years, during this time users will not have time to damage the smartphone’s battery with fast charging. At the very least, the wear on the battery will be the same as when using a regular “slow” charging block.

At the end of 2015, Qualcomm released updated Quick Charge 3.0 technology. It uses the same basic principles as Quick Charge 2.0, but now you can charge your phones even faster with QC 3.0.

In lab tests using a 2750 mAh battery, the Quick Charge 3.0 device charged the battery from 0% to 80% in 35 minutes, while the non-Quick Charge 3.0 device with a regular charger (5V/1A) reached only 12% charge in those same 35 minutes.

Charging speed from 0% to 80% in 35 minutes

This technology works on what Qualcomm calls Intelligent Negotiation for Optimum Voltage (INOV). This is a new computational algorithm that allows a device to determine the level of power it needs at a given time. This means that charging always operates at the most efficient and optimized rate of power transfer to the battery. Support for a wider voltage range (200mV from 3.6V to 20V) means your smartphone can dynamically adjust to one of dozens of charge levels.

Quick Charge 3.0 is implemented in the same way as previous versions, and all devices with QC 3.0 are fully backward compatible with gadgets with Quick Charge 2.0 and Quick Charge 1.0 on board. QC 3.0 supports USB Type-A, USB Type-C and micro USB. Manufacturers can easily use QC 3.0 for a wide range of chargers, not only classic chargers, but also power banks and other equipment.

Quick Charge 4.0

First introduced with a flagship processor, QC 4.0 promises faster charging speeds than ever before. Quick Charge 4.0 has three key improvements:

• 20% faster than QC 3.0
• 30% more efficient than Quick Charge 3
• operates at approximately 5 degrees Celsius

Additional "battery saving" features will extend the life of the phone's battery, and QC 4.0 is fully compatible with USB-PD USB (USB-PD) (Power Delivery). But the last interesting feature on our list is perhaps the most important. In its latest Android compatibility document, Google strongly recommended that manufacturers ditch non-standard USB-C chargers like Quick Charge and stick with the USB-PD specification. With QC 4.0, not only can you extend your phone's battery life to up to five hours with just five minutes of charging, but you won't have to worry about compatibility between the charging brick and your smartphone.

QC 4.0 hardly heats up the case

QC 4.0 also includes the latest iteration of Qualcomm's power management algorithm, Intelligent Negotiation for Optimum Voltage (INOV). This add-on is responsible for real-time temperature management, it will adjust the temperature while power is applied to ensure safe and efficient operation. The first devices with Quick Charge 4.0 on board are Xiaomi Mi6 and Samsung Galaxy S8 (version with SD 835 chip). More smartphones with QC 4.0 support will appear in the third quarter of 2017.

One of the most pressing problems that every owner of mobile devices such as smartphones and tablets faces, along with the increase in their battery life, is the decrease in the time that we have to spend recharging their battery.

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 your tablet and smartphone supporting Quick Charge 2.0 technology, in order to speed up the charging time of their batteries, you will also need a special power source (AC adapter) that 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.

Even if you are often near a power outlet, a smartphone that runs out at the wrong time can create many inconvenient moments. What to do if it’s time to go out and the battery hasn’t had time to charge? Or when we forgot to charge our gadgets in the evening, and in the morning they greet us with warning signs of discharge? Of course, you can always use an external battery, but you also need to charge it. And it usually takes so long to charge...

Manufacturers of batteries and gadgets are well aware of this problem - and successfully solve it with the help of “fast” charging technologies. Let's take a quick look at modern fast charging technologies, especially as they continue to evolve rapidly in 2017. At MWC 2017, Meizu presented the fourth generation of its fast charging technology – Super mCharge.

Super mCharge

Super mCharge technology allows you to fully charge a smartphone with a 3000 mAh battery in just 20 minutes. How fast is it? The Meizu prototype equipped with this technology was 11 times faster than the iPhone 7 Plus in charging speed and was 3.6 times faster than the Samsung Galaxy S7 Edge. Of course, in 5 minutes you can charge the gadget by 30%!

To achieve this result, the high voltage direct charge (HVDC) method is used. The Super mCharge power adapter produces a voltage of 11V at a current of 5A. This means that the maximum transmitted power reaches an impressive 55 W. A regular charging cable cannot transmit such power - so to use Super mCharge you will need not only a smartphone and an adapter that supports this technology, but also a separate high-power cable.

A separate plus is that the heating temperature of the battery case during such “turbo charging”, according to Meizu promises, will not exceed 39°, which will allow you to comfortably work with the smartphone, even while charging from the mains.

Quick Charge

For several years now, Qualcomm has been releasing chips that are compatible with its own Quick Charge fast charging technology. Its support is provided either by using a separate chip in the system or a compatible Snapdragon chip. For this reason, Quick Charge technology is supported not only by Android smartphones with a Snapdragon chip, but also by individual external batteries, in particular models from Xiaomi.

In 2018, the fourth generation of Quick Charge 4.0 appeared, compatible with the USB Power Delivery (USB-PD) protocol via the USB Type-C port. But previous versions of Quick Charge do not lose their relevance - they can reduce battery charging time by up to 75%. Due to the popularity of Snapdragon chips, support for this technology can be found in many flagships from various brands. Quick Charge 3.0 technology is backward compatible with previous ones - so if your gadget supports Quick Charge 2.0, a charger with version 3 will work with it.

Quick Charge adapters charge your device faster by allowing the device to accept more voltage and current. If you connect Quick Charge to an old device, nothing bad will happen, but the gadget will charge at the same rate. As with Super mCharge, fast charging requires not only support for the technology on your gadget, but also an appropriate charger. You can use a regular cable - and you can quickly charge not only your smartphone, but also an external battery!

Super Charge, Turbo Charge, Pump Express, RapidCharge, FastCharge, VOOC Flash Charging

Each manufacturer strives to implement its own fast charging option for its devices. Alas, in anticipation of the “nano” or “graphene” battery technologies promised to us by scientists (which, in theory, can be charged instantly), all current solutions are based on a single technical solution - increasing the throughput power and current strength.

As an example of an alternative solution, we can mention OPPO with its proprietary VOOC Flash Charging technology. Thanks to the eight-pin battery, each of the internal cells is charged in parallel, with a current of 4.5 amperes and a voltage of 5 volts.

Pump Express works similarly to Quick Charge, but only with MTK processors, and Super Charge from Huawei boasts high-speed charging records (but only in its flagship devices).

Instead of conclusions

When choosing fast charging technologies, ask which ones your gadget supports. And if you have an iPhone or your smartphone does not support any of them, it doesn’t matter, just choose a suitable external battery that supports fast charging, supplement it with the necessary network adapter and you will definitely not be left without communication at the most inopportune moment. And if you already have an external battery, choose a charger that supports a charge current of 2.1A, so your iPhone will charge faster.

Aukey Wall Charger is a charger that will allow you to recharge the batteries of all devices in one place. 4 USB outputs will provide simultaneous charging of four devices. This charger is suitable for both home use and travel, because it has a compact size and folding design.

• Fast charging
• Built-in fuse
• Four ports
• Universal memory

• USB-C connector
• Quick Charge 3.0 fast charging technology
• 5 ports
• Powered by network

• Compact and high performance;
• LED charge indicator;
• Qualcomm Quick Charge technology

• Protection against overheating, overvoltage and short circuit
• Three USB output connectors
• Wide input voltage range
• Informative display

• Charge current: 7.2 A;
• Total power: 36 W;
• Integrated surge protector