The Wireless Power Consortium develops and licenses Qi, the global interoperable standard for wireless charging. The idea behind Qi is simple: all devices with the Qi logo will work with all Qi chargers. No need for separate chargers, no need for cables, and no need for adapters when traveling. Qi is a global standard – this means the device can be charged wirelessly.

Despite that the Apple iPhone 6 and iPhone 6 Plus both don't support the wireless charging, Nokia, Motorola, and Intel, many international big firms have been developing their wireless charging technology.

Take Nokia into account, including Lumia735, Lumia830, and Lumia930 all support the wireless charging, along with the latest Motorola smartphone Nexus 6.

The chip vendor giant Intel also collaborated with IDT in a bid to penetrate the wireless charging market, which planned to establish the supply chain and institute regulations by the second quarter of 2015. Moreover, the third generation ultra-thin PC will have a built-in wireless charging sensing module.

Taiwanese analog IC vendors have stepped into the wireless charging, Generalplus is the first to get the WPC certification among analog IC vendors. While the handset chip giant MediaTek also received the WPC certification, and Richtek came as the second chip maker to get it.

Holtek is optimistic that they will pass the WPC certification by the end of this year.