Am not sure to understand how to do in pratique.
I can buy a bigger charger from FW.
For gaming, I have no problem under a Windows 10 partition.
Same game on Manjaro Steam need to stop my game (do a pause, recharging)
It’s OK but it is a limitation.
A full charging could help the acceptance of FW pc on the market 
I will searching an alternative charger : http://community.frame.work/t/the-power-adapter