I notice that when my energy bar is almost empty i die in one shot. It doesn't matter where they shoot me.....head, foot, hand, etc.
The more energy I have the more shots I can take. This is all happening whether or not I have armor on or not, it makes no difference at all.
This leads to me to believe that it should be called the energy/health bar. Which is complete **** because health should not decrease do to me sprinting or jumping or whatever.
I guess the only way to stay alive is to stand completely still when using any suit ability to lessen the drain and only move when not using it. (sarcasm)