Quoting the FAA
Press Release – FAA Approves Boeing 787 Certification Plan
> The battery system improvements include a redesign of the internal battery components to minimize initiation of a short circuit
Seems good news to me. Wish we had details on that one. I'm ready to swallow the whole plan if it solves both a probable cause of the incidents, and the most damaging consequences of a fire, that will remain conceivable with Lithium-Oxyde chemistry.
Full disclosure: I'm an engineer, there's electrical engineering written on my diploma, but I made most of my professional life in electronics applied to systems where "security" means resistance to hacking.