ContactlessCharging
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Sony applies for wireless power patent, wants to daisy-chain your energy
As much as we're familiar with wireless power, we know developing a truly contact-free form of charging has a whole raft of extra challenges, such as getting into the sweet spot for power delivery and the potential traffic jam caused by throwing another device into the mix. Sony thinks it has these problems licked through a newly-published patent application. Its method uses location-finding to steer users until they're close enough for the wireless power source to reliably do its job. In some cases, it can use one mobile device to relay power to another, keeping everything fed even if the main power hub is tied up. Multiple power sources next to each other can go so far as to decide which of them should be the one to send power. The patent isn't a certain sign that your VAIO or Xperia is about to cut the cord altogether -- Sony first submitted this vision of the future in 2009. Even so, it gives us hope that our gadgets will one day start charging themselves instead of making us hunt down a wire or charging plate.
Duracell myGrid USB Charger gives your Kindle 100 extra hours of life for $35
While Energizer's moving forward with its newfound Qi partnership, its bunny-less arch rival seems content right where it's at. Duracell's WildCharge-based myGrid charging mat, which was actually introduced over a year ago, is finally gaining a second good reason to purchase one: the myGrid USB Charger. The nugget you see above is a rechargeable Li-ion battery with a USB output, and according to Duracell, there's enough juice in there to extend the life of most smartphones by four hours and the life of most e-readers (Kindle included) by up to 100 hours. It's available today at CVS, Walmart, Target and Amazon for $34.99, and that does indeed include both mini-USB and micro-USB adapters. The full release awaits your eyes after the break.
Fujitsu says new wireless, contact-less charging system could hit products by 2012
There may be an increasing number of wireless charging devices available these days, but actual contact-less charging systems have so far been confined to experiments and slightly disconcerting demonstrations. It looks like Fujitsu could be set to change that, however -- the company has just announced that it will unveil a new system later this week that can charge several gadgets simultaneously over a distance of "several centimeters," and it says that it could hit cellphones and other products as soon as 2012. That system is apparently based on magnetic resonance technology, which Fujitsu notes can in theory work over distances as great as "several meters," although the efficiency is greatly diminished -- it reportedly has an efficiency of 85 percent at 15 centimeters. Details are otherwise still a bit light at the moment (including word of any actual products), but you can be sure we'll be keeping a close eye on this one.
Nagano Japan shows off yet another contactless charging system
It's been little over a month since Showa Aircraft demonstrated a contactless charging system that boasts 90% efficiency over a distance of 60 centimeters -- and now what is this? Nagano Japan Radio Co Ltd. is touting a similar system that works up to one meter, with a pretty incredible 95% efficiency at a distance of 40 centimeters. According to Tech-On, the company is currently hard at work trying to ramp the output up from "several tens" of watts to several kilowatts. As opposed to Showa's recent outing (which relies on electromagnetic induction), this system uses magnetic resonance to achieve its effect. However, as this method "drastically lowers" its efficiency when the position of the sending and receiving units are displaced, the team designed a system that automatically detects coil displacement and reorients itself accordingly. The company hopes to someday charge electronic vehicles with the thing, although we'd be happy if it merely enabled us to stow our WildCharge pads out of sight. They seriously clash with the decor here at Engadget HQ.
Showa Aircraft shows off contactless charging system, world backs on up a little
We've been hearing about true contactless charging systems for some time now (as opposed to simple wireless chargers like the Pre Touchstone), but it looks like Japan's Showa Aircraft is among the first to actually show off the real deal in action. Like some of those other proposed systems, Showa's rig uses an electromagnetic induction method, which lets it charge or power devices up to one meter apart, although it apparently works best at distances less than 60 centimeters, where it's able to reach a 90% transmission efficiency. Now, all that energy floating through the air can understandably raise a few eyebrows, but Showa assures us that it is completely safe, and they've demonstrated as much placing a frying pan between the two massive coils, which apparently did not heat up.[Via SlashGear]
