im pretty sure theyre non-regulated. mine was shipped to me at 3.93v. my best guess is that these little puppies will charge up to 4.2 and dwindle down to 3.2 by the time they need to be charged. but i havent even been through a full charge cycle yet so i dont know for sure.
speaking of charging, i think this guy is only gonna take about an hour to charge on the 420mAh charger.
oh, and i didnt realize they could be locked, i never tried. are the ones from Nett
smok brand like the ones from Madvapes?