Yesterday U.S. officials joined Japan's probe into 787 jets after all 50 of the 787s in use around the world have been stopped from flying.
A worldwide grounding of Boeing’s ‘revolutionary’ 787 Dreamliner jets is due to a burned out battery. Photographs of the charred remains of lithium ion batteries
from two separate incidents resulting in the grounding of Japanese Boeing Dreamliners indicate it
operated at a voltage above its design limit.
Link from Tony Wilson