Boeing knows how volatile its batteries can be
This Jan. 17, 2013 photo provided by the Japan Transport Safety Board shows the distorted main lithium-ion battery of the All Nippon Airways' Boeing 787 which made an emergency landing on Wednesday, Jan. 16, 2013 at Takamatsu airport in Takamatsu, western Japan.
What makes them burn so hot and fast is the electrolytes in the cells are very flammable and they produce oxygen when they burn. So when they catch fire, they usually burn until their fuel is gone. (AP Photo)