[editor-surveyor]

How many laptops are there on the average jumbo flight? 50? 60? and how many of them have caught fire? Probably none is my guess.

There is something different happening than just the presence of the battery.

[sjm_888]

From this article, you certainly are on the right track.

Dreamliner: No fault found with Boeing 787 battery

[USAF80]

How many laptops are there on the average jumbo flight? 50? 60? and how many of them have caught fire?

Are you talking about passenger laptops? If so the electrical power system are designed to only accommodate so many laptops. They use a load shedding scheme in the event of an emergency. If a laptop was to short circuit while hooked up to the aircraft system the system will dump all of them.

I think the problem is transporting batteries.