Even the use of them in the A380 emergency lighting would require a closer look. Not to mention the A350 and other.
Why? If you already have the answer at hand.
In the later the operation just requires monitoring and control of each cell voltage and temperature to keep the cells inside the envelope. (Monitoring the individual cell temperature adds extra safety to properly manage the cells and monitor the unit.)
A350 Spec:
The charging, monitoring, and protection functions are integrated in each battery.