From the Boeing website referred to above, my bolding:
"Matching the right battery to the requirements
After extensive testing, Boeing ultimately selected the lithium-ion type battery because it has the right functionality and chemistry to deliver a large amount of power in a short period of time to do a high-energy task like start a jet engine. It then has the ability to recharge in a relatively short period of time so that it is available for the critical backup role that it plays during flight. Earlier commercial airplane models, such as the 777, 747 and MD-11, used nickel cadmium (NiCd) batteries, which are heavier, larger and less powerful.
Surely the bit I bolded there would preclude just stuffing it in a box to contain the fire?
Last edited by green granite; 19th February 2013 at 07:40.