NebulaBrot: My MCM Mini, which uses the evolv DNA12, shuts down at about 3.2v. I get the stutter firing of the cart a few hits before that (I never measured, and the DNA12 doesn't have a display). My charger puts about 500mAh back into a cell, and the cells test out at 700mAh, as rated, if I manually discharge them down to 3.0v with my balance charger/discharger. So I get a little less out of each cell than I could if the DNA12 shut down at a slightly lower voltage, but I'm (being "forced" to) being nice to my batteries this way, they'll hold their rated capacity for many more charge/discharge cycles, and they'll have many more charge/discharge cycles before I have to recycle them.
Singha: 3.6v is a bit high to change out your battery. Won't hurt, but it also won't do anything more for the life and capacity of the cell than discharging it down to 3.2v.