Except for Li-po's, lithium batteries start at 4.2 volts and good ones can take a while to drop under 4 volts. I'm not aware of a mod with a .03v drop. 0.3v drop would be very respectable at 1ohm resistance.
Edit: I charge my batteries for mechanical mods when they get down to about 3.5 volts. The vape is considerably different after the voltage drops by 0.7v, I can always tell when it's down to 3.7v. YMMV. Having a voltage tester handy is a very nice thing. Best $2 in vape ware I have purchased.
#2 According to reviews, the Ea clone has a .03 voltage drop. Perhaps thats the numbers he is siting? One of the many reasons I have been pining after that mod...

I can't. 
