It's only taken a number of years and some seriously ruined pants -- but Apple has finally come clean on the flammable nature of the first-generation iPod nano, and is now offering to replace the faulty devices. After reports today that two more of the media players had lit up without warning in Japan, the company issued a statement admitting that the nanos do -- in fact -- have battery problems which cause them to smoke or spark and generally burn the hell out of things. In the company's words:

"Apple has determined that in very rare cases batteries in first generation iPod nanos sold between September 2005 and December 2006 can overheat causing failure and deformation of the iPod nano. Apple has received very few reports of such incidents (less than 0.001 percent of first generation iPod nano units), which have been traced back to a single battery supplier. There have been no reports of serious injuries or property damage, and no reports of incidents for any other iPod nano model.

Any first generation iPod nano customers who have experienced their battery overheating should contact AppleCare for a replacement. Any other customers who have concerns about their first generation iPod nano battery should also contact AppleCare."

Well, thanks guys... at least we didn't die.

It looks like laptop batteries are fast gaining on cellphones as the technology most likely to kill you, or at least give you a nasty, potentially embarrassing burn. Hot on the heels of Dell investigating its own case of spontaneous combustion, the National Transportation Safety Board (NTSB) is now getting in on the act, looking into the possibility that laptop batteries may have started a fire on a UPS cargo plane that was forced to make an emergency landing last February. The plane's three crew members managed to escape with only minor injuries, but the fire ultimately destroyed the plane and most of the cargo on board. While the NTSB investigation hasn't pinned the blame on the batteries just yet, the FAA's has Harry Webster has testified that lithium-ion batteries can vent flammable liquid and "pose a risk to the cargo compartment." We've already seen warnings not to use your laptop on your lap -- think warnings not to travel with them are far behind?