What are the advantages and disadvantages of mobile wireless charging?

With Nokia Lumia920, Google Nexus4, Samsung S6 and other models have joined the wireless charging function, this year's Apple's flagship mobile phone iPhoneX also joined the wireless charging function, then wireless charging is easy to use? Here to bring you mobile wireless Analysis of the advantages and disadvantages of charging, let's take a look.

Wireless charging principle

The concept of "wireless charging" sounds cool, and it seems to have the same impact as mobile phones instead of fixed-line, digital instead of film, and WiFi instead of cable. As soon as we saw the word "wireless", we immediately involuntarily associated with similar words such as "get rid of restraint" and "freedom." However, the seemingly cool wireless charging is not complicated in terms of technical principles. Scientists Tesla a hundred years ago have already proposed.

At present, the working mode of most wireless chargers is that the coils in the charging head rotate to drive the back coil of the mobile phone to rotate, thereby generating electricity.

Wireless charging advantages

High force

Compared with the traditional wired charging method, the wireless charging method is undoubtedly cool. It does not need to insert a long data cable on the mobile phone. When charging, it only needs to put the mobile phone on the charging board, and take it directly when fully charged. Just go.

In addition, with the development of wireless charging technology, some wireless charging bases similar to charging bowls began to appear. This year's Apple Autumn Conference PPT AirPower is a similar device, which can simultaneously charge multiple devices such as iPhone, AppleWatch, AirPods, etc., the convenience level rises linearly.

In addition, if wireless charging technology can be popularized, the charging experience in public places in the future will be greatly improved. For example, at the airport, a user with no power on the phone can simply place the phone on a desk with wireless charging.

Wireless charging disadvantage

Low power

The biggest obstacle to wireless charging that can't replace wired charging is power. At present, on smart phones, the fast charge power is generally 18W, the high can reach 22.5W; the wireless charge is only 15W, and many mobile phones only have 7.5W. First of all, in the charging speed, wireless charging is a big gap.

In the early stage of the development of smart phones, the 5W charging head is still the standard of the mobile phone. The battery capacity is generally below 2000mAh. At this time, the wireless charging function of 5W power may have room for survival. But today, the battery capacity of 3000mAh mobile phone is basically a pass line, and the speed of wireless charging is destined to be not widely used.

Bound

In addition, the current mainstream wireless charging cannot achieve the real "unbound". The technical principle of wireless charging has been mentioned in the foregoing. When the mobile phone is charged, it needs to be adsorbed on the charging base, and it cannot be moved at will, and the binding to the user is even more. At least, when the data cable is charged, the mobile phone can still be operated and used normally. It can even be played while charging on the bed; but on the wireless charging base, it can only be used for simple operation.

Big size

Generally speaking, the wireless charger base is larger and heavier than the wired charger. If you are traveling or traveling, the wired charger is obviously more convenient.

Expensive

More importantly, the wireless charger needs to be purchased by the user, and the price is very high. The cheapest one on Apple's official website is nearly 500 yuan.

To sum up

For the user, the wireless charging function of the mobile phone is a bit sloppy, and wireless charging is more like a icing on the cake. In the absence of a revolutionary breakthrough in wireless charging technology, it is not necessary to spend hundreds of pieces to follow the trend to start a wireless charger.

The page contains the contents of the machine translation.