WRAPUP 2-Still no timetable for returning Boeing 787 to flight
January 23, 2013 at 14:50 PM EST
TOKYO/ WASHINGTON, Jan 23- Japanese regulators have joined their U.S. counterparts in all but ruling out overcharged batteries as the cause of recent fires on the Boeing Co 787 Dreamliner, which has been grounded for a week with no end in sight.
