HP wants to make sure you don't get burned, literally. For the third May in a row, it's issuing another expansion of its voluntary battery recall on laptops produced from July 2007 to May 2008 -- frankly, we're considering a holiday to mark the occasion. May 2009 saw a recall of 70,000 batteries followed by an expansion to cover 15,000 in China, totaling 85,000 affected laptops. It didn't end there though, as further expansion was put in place during May 2010 to cover even more models, and this time around, a sizeable number of lappies have been added to the ever-growing list. About five percent of the models from the aforementioned time frame could have problematic batteries, and HP will be providing replacements for those at risk of getting a little too hot under the collar. If your machine was also part of the previous recalls, HP's saying those should be verified as well, even if you've done so in the past already. The full grid of affected laptops can be perused after the break -- Memorial Day weekend will be full of grilling, but we wouldn't want that to include your skin, okay?
As you may know, crafting a katana is a delicate process that involves carefully constructing a razor-sharp high-carbon edge around a soft shock-absorbent core. One day though, smiths and forging fires could be replaced by electrode-wielding mad-scientists, with the technology to selectively harden and soften metal at will. At least that's what we envisioned when we read about Jörg Weißmüller's breakthrough research in the field of nanomaterials. The German scientist discovered that by placing precious metals in acid he could create tiny ducts through corrosion. Once those channels are flooded with a conductive liquid, electrical currents can be used to harden the material and, if you change your mind about the brittle results, the effect can easily be reversed to make it soft again. The tech could eventually lead to self-healing vehicle armor or scratch-resistant cellphones -- but, really, we just want to zap our way to a high-quality samurai sword. Physorg
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