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NFC Forum Looks to Initialize Wireless Charging
May 10, 2020
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The NFC Forum, “approved and adopted the Wireless Charging Specification (WLC) that makes it possible to wirelessly charge small, battery-powered consumer and IoT devices with a smartphone or other NFC charging device at a power transfer rate of up to one watt,” it said in a press release this morning.

• “This will improve the user experience for the two billion consumers and businesses using smartphones and other NFC-enabled devices.”
• “The WLC enables a single antenna in an NFC-enabled device to manage both communications and charging. This solution makes it easier and more convenient to charge low-power IoT devices such as smart watches, fitness trackers, wireless earbuds, digital pens and other consumer devices.”

 
Wireless charging already exists, including reverse wireless charging from the likes of Samsung and Huawei smartphones. But those are additional dedicated coils. 
 

• Most smartphones and other tech devices already come with NFC. Integrating wireless charging with NFC would mean easier and more standardized wireless charging based on an already prolific standard technology.
• One watt power transfer appears low, but easily enough for small devices including earbuds and IoT things.
• No more wired charging is how the NFC Forum sees it, which created new forms of devices:
• "NFC wireless charging is truly transformative because it changes the way we design and interact with small, battery-powered devices as the elimination of plugs and cords enables the creation of smaller, hermetically-sealed devices," said NFC Forum chair Koichi Tagawa, implying all sorts of possibilities and space-savings without power-transfer via wires.
• NFC-compatible devices already include chargers, PC, tablets, and wearables: Wikipedia maintains an exhaustive list of “NFC-enabled mobile devices” which includes what may be surprises, like Nintendo Switch controllers.
• And it may integrate both communication and charging together: “For example, a Bluetooth headset which includes NFC technology for pairing could also use the NFC interface for wireless charging. In this case, the NFC antenna is used to exchange the pairing information and to transfer power,” notes the standards body.
• Given the rate of application from specification to implementation, it’s probably a year or two before the technology is adopted widely.