Boeing  has been given the thumbs-up  by the FAA to start in-flight testing of lithium-ion batteries on its 787 aircraft. Boeing was forced to suspend all of its U.S.-registered  Dreamliners, after other countries grounded their fleets , following several safety incidents  in January. The flights, which are coming after extensive nonflight safety checks, will be conducted over unpopulated areas.
Another federal body, however, has criticized Boeing's initial testing of the Dreamliner. The National Transportation Safety Board said  that the aeronautics firm both underestimated the rate of "smoke events" and failed to spot that overheating in one battery could cascade to the others and cause a fire.
The U.S. Postal Service  stopped international shipments of lithium-powered batteries  due to safety concerns. Many electronics firms have been forced to recall products  due to a propensity of lithium-based power packs to either melt or explode.
[Image by Flickr user Gordon Werner ]