Charging our devices is part of everyday life, but the unsightly cables, scrambling to find a charger, and frustration that comes with forgetting to plug your phone in is something we can all do without.
Wireless charging can help fix all this. As the future of charging evolves, the newest smart devices no longer need to be plugged into a small cable. Simply placing them on a special mat or ledge will allow them to absorb a charge.
Pronounced “CHEE,” Qi is the universal standard for wireless charging of battery operated devices like cell phones, iPods, MP3 players, and cameras. From the Chinese word meaning “energy flow,” Qi is a form of inductive or resonant charging that allows products to charge wirelessly. Simply put, Qi is the universal standard for wireless charging of battery-operated devices.
Here’s what you need to know about Qi wireless charging.
How Does Qi Work?
Qi wireless charging works like this: A magnetic loop antenna (copper coil) is used to create an oscillating magnetic field, which can create a current in one or more receiver antennas. If the appropriate capacitance is added so that the loops resonate at the same frequency, the amount of induced current in the receivers increases. This is resonant inductive charging or magnetic resonance; it enables power transmission at greater distances between transmitter and receiver and increases efficiency. Coil size also affects the distance of power transfer. The bigger the coil, or the more coils there are, the greater the distance a charge can travel.
How Does Smartphone Wireless Charging Work?
Qi uses induction and resonant charging. Wireless charging pads or ledges use inductive charging technology. The charge passes between a transmitter and receiver coil placed closely together for transferring power. The coils must be aligned to make the connection, and the two devices must be in close proximity, ideally less than 7mm.
Instead of plugging your device into a charging cable, a wireless charging pad transfers energy to your device. It doesn’t replace charging with a cable — all phones that support wireless charging can still be charged the traditional way.
Qi wireless charging is an open standard built cooperatively by some of the world’s leading companies. Any device carrying the Qi logo will work with any charging surface that carries the Qi logo regardless of brand or manufacturer. Because Qi is an established, universal technology standard, developers and consumers have access immediately. You can already find Qi in more than 90 smartphones and nearly 80 car models.
Benefits of Qi Wireless Charging
No more cables. You simply place your phone down on a charging pad. Think about it. You probably check your phone over 50 times a day, but when you aren’t checking it, it’s likely sitting next to you on your desk or a table. If you have a charging pad you can be charging it during those times without having to worry about cables and outlets. And, with no more cables, you can keep areas you work in clutter-free.
It’s convenient. All you have to do is place your smartphone face up on the mat or ledge and it starts charging.
You can charge anywhere. Wireless charging mats and ledges have already started showing up at hotels, restaurants, and coffee shops. They are also more secure than plugging your device into an unfamiliar charging cable.
Disadvantages of Qi Wireless Charging
One of the biggest disadvantages of Qi charging is it is slower when it comes to charging. It can take anywhere between 30%-80% longer to fully charge your device than a cable. Keep in mind, how you place your device on the mat or ledge can affect how long it takes to charge. If you need speed, opt for a wired connection. If you must work while charging, Qi is not the solution for you. Like many devices after charging, your device may feel warm to the touch.
Another disadvantage is that you can’t use your phone. Your device has to stay on the mat while it’s charging, meaning you can’t pick it up and use it in the way you can when it’s plugged into a charging cable.
Where will I most likely see Qi at work?
Hotels, restaurants, automobiles, airports, public venues, homes, offices, and many more places in the future.
What are the safety concerns?
The short answer is that wireless charging is definitely safe. The electromagnetic field created by a wireless charger is insignificantly little, no more than a home or office WiFi network. Rest assured that you can safely wirelessly charge your mobile device on your night stand and on your office desk.
The biggest safety concern is fakes. Have you ever received the message, “this device is not supported”? This message is a warning that the charging product is not MFi Certified and often made with poor quality components that fail to meet safety regulations.
Beware of misleading claims such as:
“Works with Qi”
“Works with Galaxy S7 and all Qi-enabled devices”
“Compatible with the Qi standard”
“Compatible with all Qi-enabled devices”
KwikBoost is Apple MFi Certified. MFi certification is crucial for charging and power products and accessories that are designed for commercial use. Ensuring that a productand accessory meets the Apple performance standards means that any iDevice that uses these products will be charged the right way. This is important because there are different specifications for all the different types of Apple devices and MFi-certified products have been tested and authorized to work with all them and in the right way.
Don’t be fooled by someone claiming to be MFi certified or even using the MFi logo. Make them prove it! Ask for their MFi contract number and product plan ID’s for the products they claim are MFi certified. And be sure to check out KwikBoost’s Qi wireless charging ledge.