Tip: All Netcom, the mobile phone term refers to the mobile phone that can support all operator systems in mainland China. Namely, it supports the mobile phone system of China Telecom, China Mobile and China Unicom.

Although many mobile phones can realize full network connectivity, wireless charging is another problem. Many Android phones on the market now support wireless charging (it is reported that Apple has recently registered a patent related to wireless charging), but there are three standards for wireless charging: Qi、PMA、A4WP。 The three wireless charging frequencies are different and incompatible. The corresponding mobile phone can only be charged with the same standard wireless charging base.

Qi standard operating frequency is 200Mhz, while A4WP operating frequency is 6.78Mhz. Although they are different, is there any way to make one chassis support multiple wireless charging standards?

Recently, the University of California San Diego has developed a dual band wireless charging device, which can support multiple wireless charging frequencies and multiple devices charging at the same time. According to the introduction of the research team, this "universal wireless charger" is "the only multi standard wireless charger base that can work at two different frequencies at the same time".

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