The amperemeter is showing up to 1000 amps...
Where were you getting the juice from to power that?!?
An engineer friend who has worked on the 787 in Seattle told me that the ability to provide a high current was the main reason for using these batteries.
There is a hint in this graphic from Boeing:
Batteries and Advanced Airplanes - Boeing 787 Updates
.... in the unlikely event the main one fails away from base
Nice one
