Theroliticaly speaking it is pie minus 1 slice equalls 300 calories of monounsaturated fat......i don't know about battery venting science....but i do like pie! lol. Seriously you have to ask the master.Concerning the Vent on mods:
I know that a lot of the cool mods (or apv's, whatever), have hidden vents nowadays. Take the Caravela with a hole in the button. My logical side tells me that there must be some kind of a formula per battery size that determines how much gas a battery can expel and how much air space is needed in order to absorb the expelled gas. But, looking at the huge battery and the tiny air space available, ... my logic flies out the window to join all my other logic that left the building years ago.
What's the formula?