Dreamliner Grounded.
I guess they thought Lithium Ion batteries were a good choice, .....based on how wonderful Nicads were?
Never failed to amuse at school when guys would argue for Nicads, half a day spent on battery overheat procedures...then when you go to a Lead Acid battery...for a tenth the cost, no inspection and deep cycles... INOP the temp guage, rip out two pages of checklist items. Now it's like car battery...either works or it doesn't.
Boeing must have some rocket scientists working there.