I am sick of getting no actual information until my invulnerability runs out, and end up dying in my own nuke or get mowed down by some strong foe who I thought I could defeat by the use of it.
I know the letters "inv" would go darker if it was nearing it's end, but I think there should be exact timers on before it expires.
This would be useful for strategic planning and avoiding stupid deaths like from a nuke you just planted or running around in lava.
The timers would be for invulnerability, light-amp goggles, the berserk pack and the envirosuit, or any other power-up you may add in the future.
The timers could either show up in the HUD or in the equipment screen, preferably both.