Originally Posted by
JWWI
What limitations do you have on physical size and weight?
Do you plan to take it on an aircraft? (if so the most powerful is limited)
How do you define powerful? (total capacity, peak output, continuous output, other criteria)
At what point does it go from a power bank to a UPS? Then you've got grid-scale batteries:
https://electrek.co/2018/01/23/tesla...lia-1-million/