Wireless charging technology stems from wireless power transfer technology, which is divided into two methods, low power wireless charging and high power wireless charging.

Because the energy is transferred by magnetic field between charger and electrical devices without cable connection, charger and electrical devices can be devised as the exposed non-conductive contact.

In the modern world, mobile devices, such as smart phone, tablet computer, wireless earphones and so forth, are indispensable to people's life. However, the energy consumption of battery comes into being along with the increasingly enhancement of mobile devices’ functions. Although the traditional cable charging is convenient, the problems like cable entanglement and damaged charging port remain. In order to solve such problems, the wireless charging technology is born at the right moment, becoming a more popular charging method.

Compared to the traditional cable charging method, wireless charging is less in loss during the transfer of energy, enhancing the utilization efficiency of energy and reducing the waste of power.

Before using wireless charger, you ought to realize the power matching problem between your device and wireless charger. For instance, your wireless charger’s maximum charging power is 30W and your phone can only support 18W charging, so your phone can only be charged with 18W power when you charge your phone with 30W wireless charger.

Although the transfer between current and electromagnetic field may cause some power loss, 80% input power can be transferred during wireless charging.

The coil design of charger takes a big part in efficiency and the excellent design and high-quality components can reduce energy loss. The cheap and unauthorized wireless charger may be made of unqualified materials and parts which are low in efficiency and unreliable.

Therefore, Upgradecharger suggests user to select the authorized and wireless charging products with bigger charging coils and efficiency in order to guarantee your better charging experience.

If your iPhone is using a phone case, you may be not able to charge your phone because of the thick case. If you still want to charge your iPhone with a case, you need to use a specialized phone case supporting wireless charging as the current wireless charging technology can only sustain the common plastic case within 4mm thickness.

Before understanding how wireless charger works, you should comprehend the current wireless charging technology principle.There are 2 common wireless charging technologies.

The effective distance of wireless charging depends on the distance between transmitting terminal and receiving terminal. Usually, a shorter distance is required between transmitting terminal and receiving terminal so as to guarantee charging efficiency and security.

QI is a standard for wireless charging and a wireless charging protocol and technical criterion formulated by Wireless Power Consortium (WPC). QI wireless charging standard is aimed at realizing interoperability amid wireless charging devices, making devices produced by different manufacturers compatible with each other.

Under the principle of electromagnetic induction, QI transfers electric energy from emitter to receiver for wireless charging by means of electromagnetic field interaction between a wireless charging (emitter) and a wireless charging device (receiver).

QI wireless charging standard supports the power range from 1W to 30W, providing wireless charging function for smart phone, tablet computer, smart watch, power bank and other devices. By means of electromagnetic induction, resonant coupling or electromagnetic radiation, it can achieve wireless charging with higher charging efficiency and speed.

Many mainstream smart phone manufacturers, such as Apple, Samsung, Upgradecharger and so on, support QI wireless charging standard. Users can realize wireless charging through placing the device on the charger with QI.

QI standard it the most popular wireless charging criterion worldwide and a number of devices like phone, tablet computer and smart watch support QI wireless charging technology.

Adopting electromagnetic induction, QI standard can charge with lower power and higher security. Meanwhile, QI charger is equipped with over-current, over-voltage, short circuit and other multiple protection mechanisms, which are effective to prevent accidents.

QI charging technology is not only compatible with various devices but also in support of interconnection among diverse charging devices. Users can use the same QI charger to charge multiple devices and charge their devices with different QI chargers.

QI standard has a certain advantage in transfer efficiency with the faster charging speed, meeting the most users’ requirements.

In conclusion, the QI standard is a smarter choice for wireless charging technology, because it has a wide range of application, higher security and compatibility and higher charging efficiency.

In general, wireless charging technology an important technical innovation for solving the problem of mobile device power. Its convenience, efficiency and comfort provide users with smarter and more convenient charging method. Along with the constant advancement and improvement of technology, wireless charging technology is bound to become the mainstream method for mobile device charging in the future and bring daily life with more convenience and efficiency.