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A4WP extends wireless charging standard to include tablets

06 Jun 2014  | Paul Buckley

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Rezence wireless charging

The Alliance for Wireless Power (A4WP) has widened the range of its Rezence-based wireless charging capabilities to accommodate multi-device wireless charging up to 50W.

Increasing the standard to 50W expands the range of products capable of using Rezence technology beyond smartphones to include laptops, tablets, and other consumer electronics. To support upcoming rapid product launches, publication and upgrade to the existing Baseline System Specification and certification programme is expected by the end of 2014.

Dell, Fujitsu, Hon Hoi (Foxconn), Lenovo, Logitech, and Panasonic have all joined the A4WP with the aim of integrating wireless charging into a wide range of consumer electronics devices. A4WP's membership has now passed the 100 mark.

"The ability to easily wirelessly charge a laptop, smartphone, or accessory marks a powerful shift, untangling us from the wires that have become a part of our everyday lives," said Peter Hortensius, chief technology officer, Lenovo. "In evaluating the different wireless charging technologies, we determined that the A4WP system operating at 6.78MHz best meets our customers' needs because it delivers the power and convenience necessary to easily charge all your devices."

Wireless charging technologies operating at frequencies lower than 6.78MHz are subject to technical limitations that make the move to higher power difficult to implement in a manner acceptable to consumers. While the organisations associated with these technologies are only now discussing the delivery of power in the 10W-15W range, Rezence technology now delivers wireless power solutions in the 1W-50W range that support multi-device charging while preserving freedom of placement in horizontal and vertical dimensions for a true drop and go user experience.

The Rezence specification also supports wireless charging of multiple devices with differing power requirements on the same charging surface, a feature unique to magnetic resonance technologies.

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