Back then ...
“Thales is determined to create the safest, most advanced, efficient and reliable power system possible for the Boeing 787 Dreamliner.
We are partnering with GS Yuasa because we are delighted with their battery technology. Since it is maintenance-free and has longer
service life comparing to current nickel-cadmium batteries, it makes for lower operating costs and increased safety for airline companies”
A no-brainer