Qualcomm has introduced Quick Charge on almost every supported mobile devices. They are providing high speed charging solutions for smartphones from the past few years. Qualcomm Quick Charge has been evolved a lot in the past some years. The latest iteration aka Quick Charge 4 can charge 50% device in just 15 minutes. Now, Qualcomm is set to embrace the wireless chargers with Quick Charge technology.

At an event here at MWC 2019, Qualcomm made some announcements related to 5G, AR, VR, IoT, and Mobile. Among them, Qualcomm mentioned about the wireless Quick Charge technology, which will allow compliant wireless chargers and devices to get benefits of Quick Charge wireless technology. The new technology will eventually debut the era of fast and seamless wireless chargers. Even, the manufacturers are inevitably going to benefit from it as most of the smartphones come with Qualcomm Quick Charge support.

Already, Quick Charge 4 supports 18W charge and Qualcomm 4+ 27 W. Now, the upcoming version is promising 32W rapid fast charging support. It will benefit almost every manufacturer who is looking for ways to improve wireless charging across their devices. Qualcomm’s announcement of upcoming fast wireless charging would have provided a sign of relief to manufacturers.

Already devices like, Google Pixel 3, Huawei Mate 20, Razer Phone 2 supports fast wireless charging of 10W-15W. Even though, Xiaomi’s new Mi 9 has just launched with the support for 20W non-Qi wireless charging.

Speaking at the event, Qualcomm said that that they want the manufacturers to support Quick Charge following Qi compatibility. The chipset maker is expanding compliance program to ensure that Quick Charge supported products meet Qualcomm’s standards along with Qi Wireless charging also.

• Read More: Xiaomi phones dominate list of phones with Quick Charge 4+ support

As of now, Qualcomm didn’t provide detail about the charging speeds or any technical numbers to guess the level of wireless Quick charge technology. Although, featuring both the Qualcomm Quick Charge and Qi wireless charging standards, Xaomi has announced wireless charging pad couple of days ago. These pads will be sold with the Xiaomi Mi 9.

(Via)

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Fast charging technology has come a long way and is almost a compulsory add-on for flagship and premium mid-range models. Perhaps, the most widely used in Qualcomm‘s Quick Charge technology with the latest being the QC4+ which can deliver a charge of 50% in just 15 minutes. Interestingly, Huawei’s own SuperCharge 2.0 is touted to deliver 70% of power in 30 minutes, while Oppo’s Super VOOC can charge a battery completely in just 35 minutes. Meaning that Qualcomm’s Quick Charge isn’t the fastest charging technology around but that will soon change as the company has revealed that its Quick Charge technology will be improved significantly next year.

Qualcomm’s Quick Charge  4+ utilises a feature dubbed Dual Charge that enables power to flow through two paths rather than one. This, in turn, increases the power output of the charger to 18W and also improves heat dissipation. Qualcomm says its next-gen QC version billed to be released next year will come with Triple Charge which will add a third flow of current. This will boost the output to a considerable 32W of power and will also improve heat dissipation.

Read Also: Qualcomm reveals Xiaomi, HMD, OnePlus, OPPO, Vivo are among its ‘committed’ 5G partners for 2019

Further, Qualcomm also indicated that it will boost the speed of its wireless charging. Next year will herald the entry of a new technology which is called True Fast Wireless Charging and makes use of Dual Charge. This will boost the charging current of compatible chargers from 12W to 15W. We don’t know what the new charging standard will be caledd, perhaps Quick Charge 5.0. However, the standard will likely be compatible with the next-generation Snapdragon 855 (or 8150) chip, throwing up the possibility that it will be on next year’s flagships like the HTC U13+, LG G8 ThinQ, and many more could support it.

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LeEco isn’t holding back when it comes to drumming up hype for their upcoming phone, the LeEco Pro 3. The company released a poster yesterday teasing the small capacity batteries in the new iPhones. Today, they’ve released another image taking aim at the lack of fast charging in Apple’s new release.

The LeEco Le Max 2 supports Qualcomm’s Quick Charge 2.0 and uses a 24W high power charger for it’s 3100mAh battery. Both versions of the Le Pro 3 will feature batteries with higher capacities than that of the Le Max 2 (4070mAh and 5000mAh). So it’s a no-brainer that they should support fast charge (most likely Quick Charge 3.0) as well.

The  LeEco Le Pro 3 will launch on the 21st of September and is already shaping up to be one of the best devices of the year. Users will be able to choose either a 6GB+64GB version with a 16MP rear camera and an 8MP front facing camera or the industry’s first 8GB RAM phone which has 256GB of storage, dual 13 megapixel cameras on the rear, and a 16MP camera in front.  Both units will sport Qualcomm’s newest SD 821 chip and will be priced between $314 and $449.

If you feel you don’t need all those specs, the LeEco Le Max 2 is one of the best value for money flagships right now. It has a 2K display, uses a snapdragon 820 chip, has a 21MP rear camera with OIS and PDAF, NFC, and a fingerprint scanner. The icing on the cake is that it sells for less than $270 for the 4GB RAM version with 32GB of built-in storage.

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ZUK announced its first smartphone, ZUK Z1 last month with flagship features such as a 5.5-inch 1080p FHD display and Snapdragon 801 chip. The highlight of the device was its support for latest USB 3.0 standard on the USB type-C port. This made ZUK Z1 the first smartphone with such configuration. Since the phone came with a massive 4100mAh battery, it was necessary for the device to feature a tech like fast charge. Also, we know all Qualcomm 800 series processors supported Quick Charge 2.0, and hence we expected even the ZUK Z1 to come with this tech. But according to a charging analysis of the international version of the ZUK Z1 flagship by the smart charger manufacturer Tronsmart, the device does not support QC 2.0. This could be due to hardware or software limitations.

Before we move on to see the analysis by Tronsmart, lets take a look at the specifications supported by QC 2.0.

Now coming to the actual analysis done by Tronsmart, they tested the international version of the ZUK Z1. This version comes with CyanogenOS and supports charging at 5V 2A. On the other hand, the Chinese variant with ZUI comes with support for 5.3V 2.5A.

Using the original 5V/2A adapter provided in the packaging, the ZUK Z1 charged up to 15% in about 20 minutes. According to their test, the phone was charging at full 2A limit when the screen was off. The total charging time from 0% to 100% of its 4100mAh battery took about 2.5 hours, which is pretty impressive.

However, we had to see whether the phone supported QC 2.0, which can take more than 2A of current. To test this, the guys over at Tronsmart swapped the original charger with their own QC 2.0 supported fast charger at 2.5A. However, even with this charger, the result was more or less the same.

As a result, it looks like the international version of the ZUK Z1 limits current to 2A, which means it does not support fast charging at QC 2.0 standard. On the other hand, the Chinese variant with EUI will charge at a slightly faster rate since its supports charging at 2.5A.

But to be honest, even without QC 2.0, ZUK Z1 manages to impresses us by charging up to 100% within 2.5 hours. So, I am sure, many won’t mind the lack of Quick Charge 2.0 support on the device.

But we would like to know if you are disappointed to hear this news? Or are you fine with the charging time of 2.5 hours?

Let us know in the comments section below.

Meanwhile, hit the source link to check out the detailed charging analysis from Tronsmart of the ZUK Z1.

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Lei Jun once said, “When many of our counterparts compare themselves to us, then, that means that Xiaomi has already become the gold standard.” In June, the Mi 4 was released keeping Xiaomi as the gold standard. The writer cannot just come to conclusions but the Mi 4’s specs and power consumption are disappointing but also a pleasant surprise. I will not talk about what is disappointing about it for now and just focus on why it is a pleasant surprise.

Just as the title mentions, the pleasant surprise is that the Mi 4 is Quick Charge-supported. Does this function work for the Mi 4 as well as Lei Jun said? Let’s take a look.

Why does the Mi 4 need Quick Charge?

       It makes sense to say that today’s smart phones are growing more powerful at an astronomical rate. Take their processing chips, for example. In just a few years, we have gone from using single-core processors to eight-core processors. Unfortunately, there has not been any real improvement in battery charging.

       Although there has been improvement in cell phone batteries, it has only been limited to battery safety and charge cycles. The level of power supply has none grown a lot. The only way to improve battery performance is to increase the battery supply or use Quick Charge.

Until now, Xiaomi has only used the former but although the Mi 3’s battery supply grew from the 2000mAh in the Mi 2 to 3050mAh, it only grew to 3080mAh for the Mi 4. Only 30mAH! This has not been the most effective method given the limited space provided by the phone. Therefore, adding Quick Charge is necessary.

Can the Mi 4 handle Qualcomm Quick Charge?

The Mi 4’s charger is called the Xiaomi Smart Charger and comes in three standards, 5V, 2A/9V, 1.2A/12V, and 1A. This charger can also be used with other devices as well.

We start charging the phone a 0%. For the first 40 minutes the screen glows and WIFI is turned own. Later, we closed the screen and WIFI but still keep the phone on.

After 13 minutes, we can see that the Mi 4 is already 15% charged. After 25 minutes, setting 10 minutes as the standard, we started calculating the rate at which the battery is charged.

Based on the results, when the screen and WIFI are closed, we can see that the MI 4 can be charged up to 49% in one hour and be fully charged in two hours. When the phone is completely turned off, it can charge up to 60% in one hour and be fully charged in two and a half hours. As the graph shows, the results we got in charging the Mi 4 are close to the official results by Xiaomi.

Conclusion

       As you can see from this test, the Mi 4’s Quick Charge mode goes well with the Qualcomm Snapdragon 801 and the phone’s power management system, but it might sacrifice battery life. Nevertheless, it will definitely be an asset in future cell phones.

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In recent years, the development of battery technology did not keep up with the pace of improved mobile performance. Bio-batteries that fuel these products are still currently in the research state. Currently, they still rely on increased cell volume to increase the battery’s capacity.

However, the battery capacity increases brought about the increase in charging time becoming longer. Standard charging current also increases the mainstream charging current from 600mA up to now 1A ~ 1.2A, which has now nearly doubled. This has happened because of different battery capacities, using the same charger, compared to iPhone and Android machines, tend to spend more time charging.

Quicker charging rates will rise to two major problems: heat and reduction of the battery’s charging life. However, this makes the charging rate less than 50% its residual capacity. At least one hour before the machine can be more than 50% of the electrical impulse. Manufacturers are beginning to think of new ways to solve this ongoing and serious problem.

Tip: The charging speed can be roughly calculated by: the Battery capacity / charging current. Analogy, a 2500mAh battery can be translated into 2.5Ah. If the charging current is 1A, then the charging time is 2.5Ah/1A = 2.5h, which is 2.5 hours. In fact, because the output of the charger is often less than the nominal value and the final process factors such as trickle charging, charging time takes longer than the theoretical time states.

Qualcomm Quick Charge (referred to as QC)

In order to improve the charging speed, Qualcomm launched its QC1.0 technology to meet the Qualcomm chipsets and with a specific core premise of the largest mobile phone can accept a 5V 2A input, so that the charging speed is greatly improved.

Followed by the launch of QC2.0 technology, Xiaolong 800 helped to improve the CPU time and with the appropriate power management chip, phones can accept a maximum input of 12V 2A. By increasing the output power, it helps to increase the charge rate. However, the high-pass technique does not give details on how to control the temperature and the battery life.

Qualcomm test machine battery is 3300mAh. Normal charge that is used is a 5V 1A input. QC1.0 uses a 5V 2A input and QC 2.0 uses a 9V 2A input.

So far, although there have been numerous phone hardware models supporting Qualcomm’s QC2.0 technology, including the HTC One (M8), 3 Unicom version of millet, etc., the charger side cannot support QC2.0 charger. While Qualcomm QC has had excellent performance in the engineering prototype, on the practical application side, due to the lack of matching charger it is not strong enough to do well in the market.

OPPO flashing technology

There is another company in the quick charge technology business that is out of the practical first step. The high-pass type, Oppo used its technology to increase the charging current, which also helped to the increase the charging power. Thus, this also increases the charge rate of the battery. Qualcomm’s technology is a combination of Oppo technology, but is self developed.

Oppo flash technology (through extra battery contacts for charging batteries in parallel) can be understood as a simple point. Typically, it flashes while the battery is charging which reduces the battery charge in a current single block. It has been designed to extend the battery’s life. Thanks to Oppo’s good relations with upstream manufacturers, the battery and the charger are individually customized, so that the battery can withstand relatively large current inputs.

Judging from the appearance, Oppo has made improvements to increase the charging port for charging and for battery contacts. The PR manager of Oppo has confirmed some of the details of the technical aspects of their technology.

After completing some battery tests, thanks to this new technology, we find that the battery’s heat levels, during the charging process, is in a controllable and appropriate range.

At room temperature, at approximately 25 degrees in the environment, it will act normal. It will flash red during the maximum temperature if it exceeds 35 degrees, a temperature slightly higher than that of ordinary batteries. However, in the hot and humid southern summers, the temperature of the battery is still a cause for concern. If the thermal environment is not very good and with the high temperature of the battery, the battery’s life will still be impacted.

Furthermore, since the output power is relatively large, the charger is not as graceful looking as any other brand charger is. It currently is close to the size of a portable wireless router. In order to charge to necessary speed and volume it is understandable. After all, there is no charger technology that can reduce the volume.

Summary

In the category of quick charge, Qualcomm have already set the standard for mobile phone products that have hardware support, but did not push for QC2.0 support parts from manufacturers for its long term large-scale practical stance.

Compared to Qualcomm, Oppo already have practical products and have successfully extended it to a certain extent on energy. We hope that this innovation can help improve battery life around the whole world.

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