Your Next Smartphone is Now Closer to Wireless Charging
The Alliance for Wireless Power and the Power Matters Alliance joined forces this week, which should help hardware makers settle on a wireless charging standard for their devices.
Wed, February 12, 2014
Computerworld — The agreement announced Tuesday that allows two of the three major wireless-charging consortiums to share their specifications means there's one less obstacle in the way of a wary mobile device industry looking to adopt the technology.
On its face, the merger between the Alliance for Wireless Power (A4WP) and the Power Matters Alliance (PMA) should allow them to create a consistent wireless charging experience for consumers with enabled devices.
That means consumers would no longer have to worry about whether their smartphone or tablet adheres to the A4WP's Rezence or the PMA's Powermat specification when they drop it onto a wireless charging spot in Starbucks, McDonald's or at an enabled store.
However, the partnership between two specification groups still leaves a horse race, with the winner determining which wireless charging technology will cross the finish line.
Like the Blu-Ray Disc and HD DVD standards (and Betamax and VHS before that), one wireless charging specification will eventually win out. Which one does will be decided by device manufacturers, not industry groups.
But, the partnership has brought together A4WP's magnetic resonance (loosely coupled) charging and PMA's inductive (tightly coupled) charging. Basically, resonance allows for multiple devices to charge at once on a pad in any configuration. Inductive charging requires an enabled device to be more precisely placed on a pad before it will charge.
Mark Hunsicker, senior director of product management at Qualcomm, demonstrates Rezence wireless charging in an IKEA coffee table.
The A4WP already had both inductive and resonant charging as part of its Rezence specification. But, the tie-up between two rivals also strengthens them against an older and larger challenger - the Wireless Power Consortium (WPC). The WPC owns the widely adopted Qi specification, which is based on inductive wireless charging, but the group also demonstrated the added ability to do resonant charging at this year's CES show.
The Qi specification, which also includes resonance and inductive technology, is supported by 200 companies, among them a veritable who's who of electronics, including LG Electronics, Sony, Nokia and Verizon Wireless. "Qi has been dominant and is way ahead of the game," said William Stofega, a program director at research firm IDC.
There are now more than 400 Qi-enabled devices today, including mobile phones, such as the Samsung Galaxy S4 and S3, Nokia Lumia 1020, LG G2, Motorola Droid Maxx and Mini and the Google Nexus 5 phone and Nexus 7 tablet.
"Almost everything [enabled for wireless charging] that shipped last year was compliant with the WPC specification," said Ryan Sanderson, the associate director Power Supply and Storage Components at research firm IHS.