Wirelessly Charge Devices Up To 80 Feet Away


Wireless charging firm Powercast unveiled its 3W wireless charging transmitter which works in the far field (up to 80 feet) for over-the-air charging of multiple devices – no charging mats or direct line of sight needed. This is the longest range observed from wireless technology till date. The transmitter is FCC-approved and ISED-approved (Canada IC: 8985A-TX91503)

PowerSpot is the industry’s first long-range, far-field, powerover-distance wireless recharging transmitter for consumer devices to gain FCC and ISED approval.

Compared to the company’s initial Powercaster transmitter (FCC and ISED approved in 2010) which was targeted at commercial and industrial applications, the new product is smaller, smarter and less expensive, and specifically designed for the consumer sector, said Powercast.

Creating a coverage area like Wi-Fi, a Powercast transmitter automatically charges enabled devices when within range.


The transmitter sends RF energy to a tiny ‘Powercast receiver’ chip also developed by the firm. The chip is embedded in a device and harvests this energy to directly power or recharge that device’s batteries.

The PowerSpot creates an overnight charging zone of up to 80 feet free of wires or charging mats.

The company says that up to 30 devices left in the zone on a countertop or desktop overnight can charge by morning, sharing the transmitter’s three-watt (EIRP) power output.

Charging rates will vary with distance, type and power consumption of a device.

“Power-hungry, heavily used devices like game controllers, smart watches, fitness bands, hearing aids, ear buds, or headphones charge best up to two feet away; keyboards and mice up to six feet away; TV remotes and smart cards up to 10 feet away; and low-power devices like home automation sensors (window breakage, temperature) up to 80 feet away”, according to the firm.

15W Multi-coil Wireless Charger for Mobile Devices

“We know consumers also want to charge mobile phones, so at CES, we will showcase a technology demonstration, developed with a partner, of a PowerSpot transmitter that adds the Qi inductive wireless charging standard adopted by many mobile phones,” said Greene. “This combination would provide a best-of-both-worlds solution, operating within the FCC regulations that exist today, including RF over-theair charging for multiple PowerSpot-enabled devices placed near the transmitter, and Qi proximity charging for power-hungry Qi-enabled mobile phones placed directly on the Qi charger on top of the PowerSpot transmitter.”

At CES, Powercast showcased prototypes of its PowerSpot, 7.3″ x 2.1″ x 1.4″, as well as wirelessly-powered game controllers, headphones, smart watches, earbuds, smart clothing, illuminated retail packaging, and reconfigurable retail price tags.

The company said it will begin production of its standalone PowerSpot charger now that is FCC approved and is also offering a PowerSpot subassembly that consumer goods manufacturers can integrate into their own products.

More information is available here.




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