NFC, which focuses on near-field communication, has just reached a cooperation with the universal stylus Alliance (USI) to promote a new WLC protocol that allows mobile devices to charge their pens wirelessly. Through this cooperation, hardware manufacturers can easily integrate the new agreement introduced by NFC alliance earlier this year into products that meet the USI standard. < / P > < p > for mobile devices, where the interior space is very valuable, the WLC standard can also help to make more space for other components (such as batteries), after all, traditional wireless charging also needs to be equipped with special coils. Of course, WLC is not without disadvantages, because its maximum output power is only 1W, so it is difficult to drive smart watches and fitness bracelets. But it’s not a big problem for a stylus with smaller battery capacity and power. In terms of specific specifications, NFC forum selects 13.56 MHz basic frequency for WLC, and uses NFC communication link to control power transmission. < / P > < p > in addition, WLC supports two charging modes, in which the static mode uses a constant RF field strength, while the negotiation mode supports a higher RF field strength (250 / 500 / 750 / 1000 MW). < / P > < p > it is not clear which mobile devices will take the lead in supporting the WLC standard of NFC forum. If all goes well, we may see the appearance of official products next year. Global Tech