Finally, you can get rid of wires once and for all: a new generation of mobile devices supports QI wireless charging technology. CHIP will tell you how it works.
Smartphone Nokia Lumia 920 on a QI wireless charger Smartphones, e-readers, tablets - many of us have been owners of these devices for a long time. Their batteries require regular charging, and this is quite troublesome. In many cases, this is a problem, since most smartphones run out of battery in one day. Therefore, it is long overdue to find a solution that takes into account both our forgetfulness and the constant need of mobile devices for electricity. Ideal would be a device, upon contact with which the gadget would immediately begin to receive a charge. To do this, the Wireless Power Consortium, which unites more than 100 IT companies, including Sony and Panasonic, has developed a single standard for wireless chargers. It is called QI (pronounced "chi"), which means "energy flow" in Chinese. The first version of the standard appeared in 2010, but the implementation of the technology was slow. It wasn't until mid-2011 that American provider Verizon began offering QI-enabled smartphones, including Samsung's Galaxy models. In 2013, the situation will change, which will be facilitated by the appearance of QI-smartphones in Russia: the new top model Lumia 920 from Nokia has built-in QI support, and for the Lumia 820, a rear cover for wireless charging is optionally available.
Quick recharge for smartphones
According to the QI standard, the charging current for a mobile device should be no more than 5W. The standard does not provide for a specific method of energy transfer, but induction charging is currently implemented, with both transmitter and receiver equipped with coils. In the transmitter coil, which is supplied with alternating current, an alternating magnetic field arises. As soon as the receiver coil is affected by a magnetic field, an alternating current also appears in it. For the most efficient transfer of energy, it is necessary to ensure the best interaction of the receiving coil with the magnetic field. In this case, the optimal distance between the transmitter and receiver depends on the diameter of the coil. The size of the transmitter coil provided by the QI standard, depending on the design features of the transmitter, ranges from 30–80 mm. The required distance is approximately a tenth of this value, that is, both devices should be located close to each other. With increasing distance, the efficiency of energy transfer decreases catastrophically - from more than 70 to several percent. In addition, for optimal transmission, it is also necessary to choose a good position of the coils in space. According to the QI standard, this task will be performed by a magnetic core in the center of the transmitter coil, which will be attracted to the magnet in the receiver.
Magnetic field as a means of communication
The magnetic field, in addition to energy, also transmits information in the form of bits and bytes generated by phase modulation of the field. Communication between the transmitter and receiver is established at the moment when the mobile device, such as a phone, is on the surface of the charger. The transmitter sends a pulse every 400ms. If the voltage does not change, this means that no energy is being transferred. A voltage drop indicates the presence of a QI-enabled receiver. After detecting the last one, the transmitter sends out a stronger pulse to "wake up" the receiver. He, in turn, "negotiates" with the transmitter on the conditions of charging, that is, the required amount of electricity, strength and frequency of the current. After that, the power transfer phase begins, the effectiveness of which the receiver reports to the transmitter every 32 ms, sending him data packets with information about errors, which can be corrected if necessary. After the battery is charged, the receiver sends an “End Power Transfer” packet and the transmitter stops working.
The new version of the standard (1.1), which appeared in April 2012, provides for the use of more efficient chargers than the base standard. Version 1.1 has a good chance of success, but not all companies are involved in the development and implementation of technology: Apple does not support QI at all, and Samsung and Qualcomm are developing their own standard. Next year, Intel intends to launch ultrabooks with support for wireless chargers. To do this, the company will use not induction, but a resonant method, but it is still unknown whether it will be compatible with QI or not.
Hello dear readers. I'm sure you've heard, at least remotely, that you can charge your phone without using wires. Surely, many dismissed, thinking that such modern technology is only in very expensive devices. And here it is not.
Supports wireless charging almost any phone, however, with some reservations. Branded smartphones already out of the "box" can receive energy through the air, while the rest will have to buy special accessories. Today you will not only find out if your mobile supports wireless charging, but also how to refuse wires if your device is outdated.
Wireless charging - what is it?
Photo: Koolpad QiBefore considering smartphone models that are equipped with wireless charging, you need to understand its essence. In fact, wireless power transmission is not such a complicated technology as it seems at first glance. Technically, wireless charging is represented by two copper coils.
One plays the role of a transmitter of energy that it receives from the electrical network. The coil is installed in the docking station (a platform on which the smartphone is subsequently placed). The second coil is the receiver. It is equipped with devices that require energy, such as mobile phones. As a rule, the receiver is hidden from view inside the case, unless it is external.
The battery of the device receives energy due to the magnetic field that occurs when the receiver is in the field of the transmitter (usually about 4 centimeters). This principle is true for the Qi standard, which is most actively used in wireless charging of wearable devices.
Smartphone with Qi icon supports wireless charging
The Qi standard was developed by the Wireless Electromagnetic Energy Consortium to transmit power over distances of up to 4 centimeters. Scientists, creating the standard, used the developments that had already been made by many other specialists.
In general, the idea of transmitting energy at a distance appeared two centuries ago, when Marie Ampère discovered a law proving that an electric current generates a magnetic field. A significant contribution was made by Nikola Tesla, who built a tower to demonstrate the wireless transmission of energy. Subsequently, many organizations and scientists were engaged in the study of technology, but a large percentage of the experiments ended in the early stages.
Until this century, the transmission of energy without wires has remained at the level of tests. So far, the technology has not become interesting to large manufacturers of portable electronics. In 2009, after the creation of the Qi standard, which became the most suitable for use in wearable technology, a number of companies began to develop concepts that support wireless charging.
The impetus for firms was the fact that the standard was free and available. Today, almost every flagship smartphone boasts the presence of technology, and the budget one boasts accessories that make the function work for them too.
Not a dozen companies are working on other power transmission technologies besides electromagnetic induction. For example, students at the University of Pennsylvania conducted an experiment in 2011 in which they proved that energy can be transmitted through ultrasound. And in 1945, the Soviet scientist Semyon Tetelbaum in an article described the possibility of energy transfer using microwave radiation. Subsequently, this technology has been actively developed. Energy can be transmitted with a laser beam, which NASA proved in experiments. Nikola Tesla, known for his experiments with electricity, even believed that it was possible to create a worldwide wireless system that would save people from power lines.
List of smartphones with built-in support for wireless charging (2019)
Well, with the theory and history of wireless power transmission now familiar, it's time to move on to devices that support the technology. Speaking of support, we include in the list devices that received the receiver already at the factory (you can install it separately).
To date, more than 80 smartphones have received Qi wireless charging, not counting a number of smartwatch models and other devices. And this figure is growing at an enviable rate. I will try to list as many models as possible - the exact list, which is regularly updated, is presented on the Qi portal.
So, wireless charging is integrated in the models (the list was updated in January 2019):
Apple
- iPhone 8
- iPhone 8 Plus
- iPhone X
- iPhone Xs
- iPhone Xs Max
- iPhone Xr
Asus
- Asus PadFone S
blackberry
- BlackBerry Passport
- BlackBerry PRIV
- BlackBerry Z30
CASIO
- CASIO G'z One Commando
Caterpillar
- Cat S50
- Cat S50C
DeWalt
- Dewalt MD501
- Dewalt MIL810G
Energy System
- Energy Phone Pro Qi
Fujitsu
- Fujitsu Arrows F-09D
- Fujitsu Arrows Kiss F-03D
- Fujitsu Arrows Kiss F-03E
- Fujitsu Arrows X F-10D
- Google Nexus 4
- Google Nexus 5
- Google Nexus 6
- Google Pixel 3
- Google Pixel 3XL
HP
- HP Elite X3
HTC
- HTC Droid DNA
- HTC Windows Phone 8X
Huawei
- Huawei Mate20 Pro
Kyocera
- Kyocera Brigadier
- Kyocera Dura Force
- Kyocera Hydro Elite
- Kyocera Torque G02
- Kyocera Torque KC-S701
- Kyocera Urbano L01
- Kyocera Urbano L03
LG
- LG G2
- LG G3
- LG G6¹
- LG G6 Plus¹
- LG G7
- LG G7 ThinQ
- LG Lucid 2
- LG Lucid 3
- LG Optimus F5
- LG Optimus G Pro
- LG Optimus It L-05E
- LG Spectrum 2
- LG Vu 2
- LG Vu 3
- LG V30
- LG V30 Plus
M.T.T.
- M.T.T. Master 4G
Microsoft
- Microsoft Lumia 950
- Microsoft Lumia 950 Dual Sim
- Microsoft Lumia 950XL
- Microsoft Lumia 950 XL Dual Sim
mlais
- Mlais MX69W
Motorola
- Motorola Droid Maxx
- Motorola Droid Mini
- Motorola Droid Turbo
- Motorola Droid Turbo 2
- Motorola Moto Maxx
- Motorola Moto X Force
mPhone
- iPhone 8
NEC
- NEC Medias PP N-01D
- NEC Medias X N-04E
Nokia
- Nokia Lumia 1520
- Nokia Lumia 735
- Nokia Lumia 830
- Nokia Lumia 920
- Nokia Lumia 928
- Nokia Lumia 929 (Icon)
- Nokia Lumia 930
- Nokia 8 Sirocco
Oukitel
- Oukitel U23
Panasonic
- Panasonic Eluga P P-03E
- Panasonic Eluga V P-06D
- Panasonic Eluga X P-02E
- Panasonic Eluga X1
- Panasonic Eluga X1 Pro
Philips
- Philips X723
Razor
- Razor Phone 2
RugGear
- RugGear RG730
Samsung
- Samsung Galaxy S6
- Samsung Galaxy S6 Active
- Samsung Galaxy S6 Edge
- Samsung Galaxy S6 Plus
- Samsung Galaxy S7
- Samsung Galaxy S7 Active
- Samsung Galaxy S7 Edge
- Samsung Galaxy S8
- Samsung Galaxy S8 Active
- Samsung Galaxy S8 Plus
- Samsung Galaxy S9
- Samsung Galaxy S9 Plus
- Samsung Galaxy Note 8
- Samsung Galaxy Note 9
- Samsung Leader 8
- Samsung W2016
Saygus
- Saygus V SQUARED
Sharp
- Sharp Aquos EX SH-04E
- Sharp Aquos SH-07D
- Sharp Aquos SH-13C
- Sharp Aquos Slider SH-02D
- Sharp Aquos Zeta SH-06E
- Sharp Aquos Zeta SH-09D
- Sharp Q-Pot SH-04D
- Sharp SH-05D
Sony
- Sony Xperia Z3V
- Sony Xperia Z4V
- Sony Xperia XZ2
- Sony Xperia XZ2 Premium
- Sony Xperia XZ3
Techdy
- Techdy Basic Bear
- Techdy Bear Pro
Vertu
- Vertu Aster
- Vertu Signature Touch
Xiaomi
- Mi MIX 2S
- Mi Mix 3
YotaPhone
- Yotaphone 2
ZTE
- ZTE Telstra Tough Max
- ZTE Axon 9 Pro
This is not a complete list - there are a number of models from lesser known companies. Don't be surprised if the popular iPhone isn't on the list. It's not a mistake. Officially, Apple has not yet integrated wireless charging into its products. But there is a way out, more on that below.
The smartphone models on the list only require the presence of a platform, which is necessary for the transfer of energy. It is usually included with the mobile device, but not always. In this case, you will have to purchase a docking station separately.
Usually, the manufacturer releases a branded model, but others can be used - there is no special binding of a smartphone to a specific site. You can even order a cheap "noname" docking station, which in most cases will satisfy the needs of the buyer.
What to do if the smartphone does not support wireless charging
If you did not find your device in the list of supported smartphones, do not rush to get upset. There is an exit. More precisely, there are two of them. So, perhaps your phone is among those for which receivers (small plates with a built-in circuit) are specially produced for wireless charging. This list includes quite popular, but outdated models. There are exceptions, such as the iPhone 7.
Both popular and not obsolete, and the manufacturer did not integrate the receiver. Receivers designed for certain models receive the appropriate designation, as well as the desired characteristics. For example, similar receivers for Samsung Galaxy S 5 or older solutions have unusual contacts that correspond to those under the cover of devices. Here are the most popular models that received special receivers:
- iPhone: starting with the "four".
- Samsung Galaxy: S3, S4, S5; Note 2, 3, 4, Edge.
- LG: G4, V10.
- Sony: Xperia Z3+/Z4; Experia Z5; Experia Z5 Premium.
- Huawei: Ascend Mate 7, Mate S.
The receiver for these devices usually comes with a docking station. You can buy parts separately - there is no particular binding. In addition to boards (receivers), there are also special cases on the market for wireless charging of devices that contain a copper circuit inside. For each smartphone, a case is made in the appropriate form.
Universal Solutions
There are more and more devices supported by wireless charging, but manufacturers are in no hurry to bring the technology to the budget segment. And he is the most popular. Especially cheap smartphones are loved in China, where they came up with the idea of producing universal receivers for any model.
A docking station + receiver kit costs about 500-700 rubles (you can find it cheaper), the main thing is to choose the right one for your smartphone. We pay attention to the shape and connector. A universal receiver can be found for almost any smartphone.
Docking stations
Photo: Wireless charging for iPhone So, figured out the support for wireless charging smartphones. Now I would like to dwell separately on the platforms that are used to transfer energy to the device. For what?
Unlike receivers, which are either hidden inside the phone or are a featureless record, docking stations allow the user to choose the model to their liking. Some companies even provide original solutions that will become part of any interior.
Samsung's oval-shaped wireless charging dock is especially popular. It is suitable not only for charging the company's smartphones, but also for most other models.
Of the features, it is worth highlighting support for automatic shutdown when the device is fully charged, as well as light indication. The average cost is 2000 rubles, but in Chinese online stores you can find a cheap replica for 400-700 rubles.
The model of the Woodpuck FAST Edition Bamboo platform, which is made of wood, is also interesting. The manufacturer, so to speak, combined modern technologies and natural materials. The functionality does not differ from other docking stations, but it looks catchy. The cost is $40.
But Aukey QI boasts compact dimensions that allow you to take charging with you. Yes, and the price is low - $ 30. Fans of purchases from China have a choice of huge catalogs, in which it will not be difficult to find a cheap and beautiful docking station.
Photo: Designo Curve MX34VQ Among the unusual wireless charging stands, we can highlight the new TV from Asus - Designo Curve MX34VQ. More precisely, the leg on which he stands. It is made in the form of an oval platform, on which the smartphone is placed for charging. It even has a backlight. Asus, following modern trends, has made the new device not only beautiful, but also useful. True, the price "bites".
Outcome
It is safe to say that the list of devices supported by wireless charging will only grow. A technology that can get rid of a bunch of wires is of interest to both the user and the manufacturer, who receives additional income for its presence.
In a couple of years, every smartphone will probably support wireless charging. In addition, not a dozen companies are working on the development of even more advanced technology that will not be tied to a docking station. We, ordinary users, have to wait a bit to forget about the main problem of portable devices - attachment to the outlet.
In short: take it!
The purpose of this review is to provide basic technical specifications, not to write a novel. In Russian and literature, I had fours, I did not like compositions. Find errors, write, correct. And in general, as the Chukchi would say: "Yours want to buy a product, mine is yours to write a review."
Background. Order
I decided to get a wireless charger for my Chinese phone (Samsung Galaxy Note II clone). Choose the cheapest options. As a result, I ordered separately a universal charger and a receiver with a micro USB connection. They came in regular bubble bags. The charger-transmitter comes with a white USB cable, 80 cm.
Specifications
Charging-Transmitter:
Input voltage: DC 4.6-5.5V
Input current: 1000-2000mA
Driven load: 5W
Charging efficiency: 75%
Operating temperature: 0-45
Humidity range: 45-85%RH
Charging frequency: 100-200KHz
Power distance: 5mm
Dimension: 155 x 84 x 9mm
Electric energy transition: 72%
Weight: 104g
Light status: 1.Red led: standby; 2.Blue(or Green) led: charging; 3.Flashing: voltage/current/temperature anomalies
Receiver:
Input: 5V
Output: 1000mA
Size: 69x44mm
Testing:
First of all, I decided to measure the current during normal charging of the phone. For this, I used a folk USB tester and the Ampere program. To my surprise, the results were different. I don’t know what to sin on, maybe the program makes incorrect measurements.
I don’t know who to believe, but I will be guided by the testimony of the program.
In Standby mode, the red LED is barely noticeable, the tester shows zero current consumption (in fact, it is less than 50 mA, there is nothing more accurate to measure). Therefore, you can safely leave charging in standby when there is no need to charge the phone.
When the phone is put down, charging is activated and a moderately bright blue LED lights up.
In charge mode, the transmitter consumes about 780 mA (according to the tester).
At the same time, the phone receives about 540 mA (according to the program).
For my phone, the difference is not great, so it does not take much more time to charge wirelessly. For those whose phone directly consumes about 1 A, for those the wireless option will be twice as long. During operation, charging and the phone do not heat up significantly, it feels warm, about 30-40 degrees.
A few words about the receiver.
Achtung! When buying, pay attention to which way the micro USB connector on your phone is turned. On aliexpress, I met the receiver in two variations.
The thickness of the receiver is not uniform. The main area has a thickness of 1 mm, at the location of the microcircuit 1.45 mm (measured with a caliper). Fits perfectly for my phone. The lid closes tightly, nothing sticks out. True, I had to cut off the latch on the inside so as not to transfer the cable. The cable is very thin, only 0.2 mm. I can’t show pictures with the phone, because the only camera is the phone itself.
At the end of the charge, the transmitter continues to glow, consumes about 600 mA and remains warm. Since the phone stops consuming energy, everything goes to an unwanted electromagnetic field.
Total:
Pros:
- cheap
- Universal
- Fairly thin receiver
- There are no problems with positioning, charging does not stop from a slight displacement of the receiver and transmitter.
Minuses
- No automatic shutdown at the end of the charge
- Short USB transmitter cable, only 80 cm.
- The receiver outputs about 500 mA instead of the declared 1000 mA.
- USB is constantly busy. To connect something to the phone, you have to remove the cover. It will be problematic to recharge the phone via cable. To transfer files, you have to use Bluetooth or WiFi.
I am satisfied with the purchase, now there is no need to reach for the cable and try to get into the phone connector in the twilight. I recommend it to everyone who is not critical of the charge time.
P.S. No cats, dogs, cockroaches or other pets!
I plan to buy +17 Add to favorites Liked the review +10 +23They have wireless charging capability: the flagship model is air-charged out of the box, while for the Lumia 820 you need to purchase a replacement case with wireless charging capability.
The world has already been shown devices with wireless charging, such as the Touchstone charger for Palm Pre, Powermat for iPhone, induction chargers from Energizer. But unlike these chargers, which are built to their own specifications and are therefore incompatible with other devices, we use the Qi standard, the only globally accepted wireless charging interface created by the Wireless Power Consortium, which consists of more than 100 different companies.
Qi standard designed to transfer energy to various devices using magnetic induction. Technically, this is very similar to the solution used to charge electric toothbrushes.
How it works?
In simple terms, the base station consists of an induction coil that creates an electromagnetic field when an alternating current is applied. The device to be charged contains a similar coil capable of picking up this field, converting the received energy into direct current, which is used to charge the battery.
If we consider the process in more detail, then in wireless charging, the transmitter ( transmitter) consists of a current converter ( ac-dc power converter), master devices ( drivers), transmitting coil ( transmit coil), potential and current readings ( voltage and current sensing) and controller ( controller). Receiver ( receiver) contains the receiving coil ( receive coil), rectifier ( rectification), voltage regulator ( voltage conditioning) and controller ( controller).
Energy is transferred from the transmitter to the receiver through an interconnected magnetic field generated by the flow of alternating current through the transmitter coil. If the receiver coil is in close proximity, a significant portion of the transmitter's power lines will pass through the receiver coil, creating an alternating current in the receiver, which is then converted to a DC voltage.
You can view an interactive presentation with a detailed description of the technology on the WPC website.
- The charger may consist of several transmitting coils, which are activated depending on the position of the device to be charged on it.
- The Qi standard supports the data transfer protocol between chargers and charged devices at a speed of 2 kbps. Now, using this protocol, information about the required level of electricity for a full charge is transmitted from the device being charged, as well as messages that the device is charged.
energy efficiency
The energy efficiency of Qi wireless chargers is approximately 80%. It should be understood that it is simply impossible to achieve 100% energy efficiency; for standard wired chargers, this figure ranges from 75% to 95% at best.Safety
Regarding the safety of wireless chargers, we can state that we use non-ionizing frequencies that do not have harmful physiological effects. The Qi 1.1 standard includes the detection of foreign objects in the field of action of the charger, providing additional safety of use; Charging is only possible with Qi-compatible devices. Also, our chargers and smartphones have built-in safety mechanisms based on thermal control.The future of wireless charging
Following the publication of the low power (five watt) Qi specification in August 2009, in 2011 the Wireless Power Consortium began work on extending the specification to medium power, allowing power to be increased to 120 watts. Despite the fact that the first specification is enough to charge phones, the new Qi standard will be able to provide not only charging smartphones, but also, for example, tablets that require more power.Thanks to the Wireless Power Consortium, the wireless charger ecosystem is growing at a very fast pace. So, we have signed agreements with Virgin Atlantic and The Coffee Bean & Tea Leaf, where soon all tables will be equipped with built-in chargers: the phone will be charged just lying on the table while you drink your coffee. In Russia, we are also negotiating cooperation with various businesses in order to introduce the same tables with wireless chargers in their establishments as soon as possible.
In addition to the main charger -
Good day, dear Muscovites! Wandering through the domains of Uncle Ali, I was looking for something to pamper myself and came across this lot. The idea to charge your smartphone without plugging in cables has been around for a long time. it's comfortable. But at the moment, the QI standard is supported mainly by flagship devices from A-brands. The Chinese decided to fix this by rolling out receivers to the market that are glued to the back of the device and covered with a bumper. If you are interested in how it all looks and works, then I ask under cat.
Cost, delivery and packaging
The cost at the time of purchase was $23.3 plus aliexpress issued a $4 coupon for purchases over $5. You can choose delivery from China or Russia, this does not affect the price. Sent by courier service 007ex. The order was placed on January 27, the parcel was received on February 02. It was packed in an ordinary package, without a bubble wrap. The contents were not affected. Only the memory box was slightly wrinkled.The box from the charger is made very soundly from thick cardboard. Completely black with 'Magic Disk' embossed and printed in color with the number '4'. Below information about the manufacturer, model, certificates and a holographic sticker with a verification code. In general, stylish and practical. The box from the receiver is made of less high quality from thin cardboard, in such covers are usually packed. Could not stand the first opening and broke.
Equipment
The charger comes with a microUSB cable, instructions (including those with crooked Russian) and a couple of some pieces of paper.There is nothing included with the receiver other than the receiver.
Appearance, work, characteristics
Charger
As the name implies, the device is a disk with a diameter of 110 mm and a thickness of 16.5 mm. Made entirely of plastic, except for the anti-slip rubber ring on the bottom. The working part consists of a white ribbed substrate (somewhat reminded of a gramophone record) and a black disk in the center, under which the coil and LEDs are hidden. Everything is covered with transparent plastic. Haven't found any scratches yet, but it's picking up prints.On the bottom there are ventilation holes and a rubber insert from slipping, in the center there is information about the product. On the right is the button for switching backlight modes. Above is the microUSB port.
The backlight has 5 modes of operation. At idle - 3 (off, white constant light, smooth color change) and when charging - 2 (off, blue constant light). During the day / with the lights on, it is only visible under the black disk. In the dark, the entire substrate is illuminated. Switch modes with the button on the right. 
The manufacturer declared the input 5 V, 2 A or 9 V, 1.7 A (fast charging). I can’t check this data, because there are no suitable devices. But judging by the reviews, fast wireless charging works. When you put the phone on charge, the backlight will turn blue. At the end of charging, it should either go out or light up in white. But it keeps turning blue for me. The phone at the same time eats about 250 mA, just like when charging with a cable.
Receiver
The receiver is a plate measuring approximately 80x48 mm, from which a flat cable comes out with a microUSB connector at the end. The length from the beginning of the plate to the connector is 105 mm. 5 types are available: 2 for iPhones, 2 for microUSB and 1 for USB-C. On the product page there are instructions on how to choose a receiver for your device. The coil and smd elements are probed on the plate. There is a strip of adhesive tape on the inside for a more secure fit on the back of the smartphone.
Installation is insanely simple. First, we insert the connector into the socket, peel off the protective layer of adhesive tape and fix the plate on the smartphone, put on the case. Everything can be used. 
Due to the location of the camera and the fingerprint scanner on my smartphone, the receiver slightly runs into this same scanner. It does not affect the operation of the scanner in any way, but it definitely spoils the appearance. Also, the appearance spoils the connector itself. Looks like a wart on the body.
The manufacturer declared 5 V, 1 A at the output. And he did not lie, his 1 A receiver gives out when the voltage drops to 4.9 V. When charging, it noticeably heats up, up to about 40-45 degrees.
At idle, the voltage is 4.99 V: 
At the beginning of charging, it gives out 0.7-0.9 A: 
But then it gets hot and gives out the declared 1 A: 
For comparison, charging from a conventional charger: 
and from memory with QC 3.0 support: 
conclusions
By ZU. Nice charger with support for fast wireless charging (sorry for the tautology). With iridescent backlight, it can be used as a night light. From nit-picking - rubber inserts on the front panel for better grip would not hurt.According to the receiver - a contradictory device. On the one hand, a good way to add QI to your smartphone. On the other hand, the constantly occupied USB connector spoils the raspberries. But, in which case, the plug can be folded back and charged in the usual way. I use WI-FI to transfer files to and from my computer, so this is not a problem for me. Also in the minuses I will bring tangible heating and the appearance of the resulting structure - it looks a little collective farm. Owners of smartphones with a fingerprint scanner location like mine, carefully check the dimensions - the plate can close it.
That's all. Thank you for your attention and happy shopping.
I plan to buy +7 Add to favorites Liked the review +20 +42
