Mobile phones that support wireless charging are now limited to a few brands of high-end product lines, such as Samsung Galaxy S/Note series (supported from S6), Sony Xperia Z4v/ZX2, Huawei Mate RS, Xiaomi MIX2S, nuts R1, Nokia 7 Plus/8 Sirocco, YOTA Phone 2, etc. As Apple introduces wireless charging from the iPhone 8 series as standard, it is a matter of time before this wireless charging technology is popularized in the mobile phone ring (mid-to-high end).

As for the wireless charger, there are now a lot of brands and models available. Its price varies, sometimes the standard is different. So how do we choose the right wireless charger for us? When choosing a wireless charger, we can consider it in the following aspects.

First, we need to choose the most suitable wireless charger from the security aspect. After all, safety is the most important thing. We want to meet the Qi standard as the primary assessment target when choosing a wireless charger.

In addition, this device has two very critical functions that are easily overlooked by ordinary users - FOD foreign object detection and cooling. Among them, FOD foreign matter detection is easy to be "castrated" by low-priced products to reduce costs, and without the charger of this function protection, once a metal object is accidentally placed on the coil sensing position of the charger surface, the metal will be quickly Heating can easily cause accidents.

The foreign object detection function allows the wireless charger to “smartly recognize” the mobile phone, and only the mobile phone with the built-in coil will be wirelessly charged. However, in the process of wireless charging, the charger end will generate a lot of heat, and some chargers that support 7.5W and 10W fast charging technology have higher heat at full speed output. Therefore, it is very important to adopt an active or passive cooling method inside.

The so-called passive heat dissipation is the natural cooling of the wireless charger by means of metal thermal conductive sheet + thermal conductive glue, and the heat dissipation efficiency is generally general. Active cooling is to install an additional centrifugal fan and corresponding cooling holes inside the wireless charger to quickly dissipate heat through the air-cooled form, and the effect is generally better.

Don't underestimate the impact of temperature on wireless charging efficiency. Many mobile phone manufacturers will set strict temperature walls. For example, Apple has set a rule in Apple iOS 11.3: When the heat output of the back cover of the mobile phone reaches a certain value, it will By reducing the receiving power of the mobile phone, the heat is reduced, but the result is that the wireless charging speed becomes super slow.

Some media have tested this, even if Apple's officially authorized price of 498 yuan, mophie and Belkin will cause a 50% drop in charging speed due to heat, from wireless fast charging to wireless slow charging.

Second, we can choose the right wireless charger from the experience. Generally speaking, from the experience point of view, whether the phone can be placed upright (elevation angle) without affecting the charging effect should be an important evaluation standard for wireless chargers.

The reason is very simple. In a few hours of charging time, you can't always play without a mobile phone? With this product, we can play the phone while charging, is it really great!

In addition, when the vertical wireless charger is selected, the product with 2 built-in electric coils and fans can be preferentially selected, so that the mobile phone can be placed on the charger in a more random posture, whether it is horizontal or vertical, slightly biased. Shift can also transmit power, and there is no need to worry about the mobile phone's input power being reduced due to heat.

Finally, we also need to select the best matching wireless charger according to the wireless fast charging technology protocol supported by the mobile phone. For example, iPhone users should choose Apple 7.5W fast charging technology, and Samsung mobile phones need to support Samsung 10W fast charging technology. Each product will also indicate the supported fast charge technology agreement and compatibility list on the relevant publicity parameters. You can pay attention to it at that time.

As long as you pay attention to the above three points, you can choose the most suitable wireless charger. When buying a wireless charger, be sure to buy the safest one. Don't try to bring some security risks. There are also some very cheap wireless chargers that can damage our phones, causing our phones to lose their useful life. Therefore, we must carefully choose our wireless charger.