Good question, so I just checked. Looks like it's the same. I was measuring a little shy of .2v drop before, and looks the same now.
P.S. I haven't learned the science of measuring voltage drop yet, but the .2v drop was measured touching the pos and neg posts of an rda with a 1.4ohm coil. Metering he 510 connection (no load) gave me just a hair shy of 3.7v. Metering the rda posts (loaded)gave me 3.5v.
What I don't understand is why there is no drop comparing voltage straight from the battery ends vs voltage at the 510 connection. It seems that would show how well current is flowing through the device (?)
im interested in this too. i thought we needed more tools than just a multimeter to determine voltage drop.