Another question. I do assume that also the 787 has the requirement to run at least 30 minutes on battery power, should all the generators drop offline. Now, seeing that a great number of systems that are pneumatically or hydraulically powered on other types run on electricity on the 787, I assume that the batteries need to provide not only power for the systems normally running on electricity, but on top also the cabin compressors and the anti-ice systems during the certified time - or will those systems (at least partially) fall victim to load shedding in such a situation? As these two systems tend to be fairly large consumers, I would assume that the batteries must either be immense or that there are some additional emergency batteries installed in the aircraft beside the 3 already mentioned ones?