Quick charge 3 0 what is it. Qualcomm Quick Charge - what it is and how fast charging technology works. Safer operation
With the release of each new generation of smartphones, processors become faster, screen resolutions become higher, applications become more power-hungry, and batteries... The batteries are still the same. To somehow compensate for this shortcoming, manufacturers use fast charging technologies. But, in addition to the advantages, they can bring a lot of problems to the smartphone owner - from banal incompatibility and reduced battery life to burned-out smartphones and power supplies.
Today, we have access to a wide range of charging protocols, developed and promoted by different companies and organizations. If possible, we will try to adhere to the chronology.
Regular USB
USB allows a current of no more than 500 mA at a voltage of 5 V. Only much later, with the release of the USB 3.0 specification, the maximum current was raised to 900 mA. Ordinary push-button phones, which began to come out not with their own charging connectors, but with mini- and then microUSB plugs, were quite enough with a little power.
Everything changed with the release of smartphones, the battery capacity of which was several times greater than the relatively small battery capacity of push-button phones. Even small batteries by modern standards with a capacity of 1500 mA ∙ h already wanted to be charged faster than in 4–4.5 hours (time taking into account losses during charging and the natural slowdown of the charging speed after 80%). There was a need to somehow transfer a larger charge current over a standard cable without accidentally burning the USB controller if the device is connected to a computer.
USB Battery Charging Revision 1.2 (BC1.2)
This standard was adopted back in 2011 and allowed early devices to be charged from USB connectors with a current of up to 1.5 A at a voltage of 5 V. The standard was adopted by the USB-IF organization, so its use is free for manufacturers. By modern standards, it is very primitive: the type of charger is determined by the voltage on the D+ and D- contacts.
Fast charging /2 connectors
One more connector
Convenience and practicality
Are all your sockets already occupied by various USB chargers? When you're on a business trip, does it always seem like one charger isn't enough? Dual USB charger from " Xiaomi 2-USB Quickcharge 3.0" will help you solve these minor problems, because with it you can charge two devices at the same time. At home, in the office or on a business trip – practicality and convenience will always be with you.
QC3.0 – increased speed
Dual USB charger "Xiaomi 2-USB Quickcharge 3.0"uses a special chipset to recognize gadgets that support QC3.0 technology. Also, both charger connectors support QC3.0, which significantly increases the charging speed - the total output of the two connectors can reach 5V3.6A. You can trust your gadgets to the Xiaomi charger and relax, and as soon as you wake up, they will be fully charged.
Supports Android and Apple
Xiaomi 2 USB Quickcharge 3.0 Supports QC3.0, BCI2 and other charging protocols, so you can charge not only Android devices, but also Apple smart gadgets. Thus, the charger will satisfy your needs for charging devices with different OS.
Many types of protection
Safer operation
To avoid current leakage, short circuits and even subsequent fires, the Xiaomi Dual USB Charger provides 8 types of effective protection through high-precision hardware - overvoltage, input overcurrent, output overload, ripple, short circuit, overheating, electromagnetism, static current and other problems.
Input AC100-240V
Challenging higher standards
The wide current output range AC100-240V overcomes voltage limitations, so you no longer have to worry about charging while traveling. At the same time, the Xiaomi dual USB charger is also effective at an absolute altitude of 5000 meters, thereby solving the problem of charging at high altitudes.
Compact and neat
Convenient to use when traveling
The collapsible plug not only reduced the volume of the charger, but also prevented damage to other items in your luggage or bag. The surface of the case was subjected to a mirror-like glare treatment, and using ultrasonic technology we completed a seamless assembly of the charger. Thus, along with protection from moisture and dirt, the device also has a beautiful appearance.
It has long been noted by experts that the capacity of rechargeable batteries is not enough for long-term operation of devices. In addition, many of them have recently developed an appetite for electricity consumption. Therefore, Qualcomm decided to upgrade the already familiar Quick Charge technology according to the first and second versions. The new version of accelerated battery charging Quick Charge 3.0 copes with its assigned responsibilities much more efficiently than its predecessors.
Unlike Quick Charge 1.0, this technology charges the battery 2 times faster. Quick Charge 2.0 doesn't have such a big gap, but it still fully charges a smartphone or tablet 38% slower than Quick Charge 3.0. It should be said that the standard method of recharging the device is 4 times inferior to the new one. An updated version of Quick Charge technology charges a mobile device by 80% in 35 minutes and at the same time reduces energy consumption and overheating of the device.
This technology increases charging speed by optimizing the process itself, reducing power consumption and reducing heat generation that is harmful to batteries. However, this technology has certain limitations. For example, if you connect a smartphone rated at 2 Amps to a charger running at 0.7 Amps, the mobile phone will not charge quickly.
Let's compare the technical characteristics of the current Quick Charge technology with previous solutions to understand what its advantage is:
The main innovation here is INOV technology, which allows you to significantly speed up the charging process. This smart voltage matching feature helps devices independently set the desired voltage level. So, if in the 2nd version you had to choose between 5, 9, 12 and 20 V, now the mobile device will be able to change the voltage in the range of 3.2-20 V in steps of 200 mV. In addition, the new standard supports USB Type-C.
Different batteries require different voltages when charging. INOV allows you to calculate the output power and thereby improve the charging process. The previous version of Quick Charge provided 4 operating modes: 5V/2A, 9V/2A, 12V/1.67A and 20V. The new method is designed to connect to a gadget and find out the required voltage reading from it. As a result, a wide range of voltage levels are supported.
INOV makes it possible to dynamically adjust to the voltage level required by the battery. As INOV charges, it gradually reduces the required current. This is why it takes longer to charge the last 20% of the capacity.
The latest development optimizes the voltage supply and reduces wasted energy. Considering that excess energy always turns into heat, this option not only increases energy saving, but also increases the battery life, since the gadget stops heating up excessively. That is, the main innovation here is not the speed of charging, but the ability to save energy.
Quick Charge 3.0 is based on charging the battery with a higher voltage. Of course, the mobile device and charger must support the existing voltage and current parameters. For example, if the smartphone is rated at 9B/2A, and you only have a 1 Amp power supply, then it will take longer to fully charge the device.
It is worth noting that the new product has not lost backward compatibility with previous versions of the standard. And yet, when charging the latest generation of devices with chargers of lower power, it is impossible to achieve the highest speeds.
Even though all of Qualcomm's latest chipsets have Quick Charge support, phone and tablet manufacturers have had to use specialized circuitry to make the fast charging option work properly.
Today Qualcomm is primarily a chipset maker, but 20 years ago it made cell phones. It is possible that the accelerated charging feature will be supported by inexpensive devices produced jointly with Microsoft. Qualcomm also created technology for wireless charging of metal devices, and its Snapdragon processors are used in many popular phones and tablets.
Today, the innovative Quick Charge 3.0 technology is supported by all flagship smartphones (for example), released based on Snapdragon 820/821 chips, as well as some new products in the mid-price range. According to experts, this development has become one of the most attractive options in smartphones of the past year.
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 the necessary charge of energy faster.
A visual explanation of this principle:
How did the creation of Quick Charge begin?
When the Quick Charge function was in its infancy, developers tried different methods to reduce 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,” special controllers began to be added to the motherboard, which 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 the new firmware version supported Quick Charge 3.0, since when the phone was charging, a saying “Fast charging” appeared. 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 have this feature 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 a 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 to you, when purchasing a phone, check with your consultant in advance about its availability in the selected model. As mentioned earlier, simply purchasing a 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 have the software 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 during power supply (especially excessive use) can lead to overheating, as mentioned earlier, and disrupt the joint operation of the phone with the 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.
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.