Thanks for the tip. I tracked down a constant drain on my suit energy, and it wasn't the Night Vision Goggles. It's the Belt Immunity upgrade. For whatever reason, that drains energy constantly even when it's not actually being used (I'm not standing on any belts), which is what's causing the constant fuel burn. That's not at all related to your mod, but it's also kind of an odd design. The Exoskeleton doesn't drain my battery when I'm not moving, after all. I wonder if that thing's worth keeping, in that case.
I'm carting around two burners right now, which I REALLY do need to support my fancy new Roboports :)