Hi all. Just received my black SB yesterday.
Had been using a Tornado + LR atty.
I noticed the performance of the SB
at 6v with a standard 510 atty is
pretty comparable to Tornado + LR atty.
Any advantages/disadvantages with
regard to battery life, atty life
(and any other issues)
going with the SB at 3.7v and using
a LR atty?
Insights welcome.
Someone made a video of this very comparison. I don't have schematics of these
devices, but you are essentially trying to get coil
wattage (heat) to be about the same for these two PV setups. Qualitatively, since the coil is not the only resistance in the circuit (there are wires and a switch too),
P = (V^2)/(
R)
where
P is the power (wattage),
V is the voltage, and
R is the resistance. To get the same wattage from a coil at 6V and 2.5 ohm from a 3.7V circuit, you need to lower
R. Thus the low-resistance atty gives more power at 3.7V than a higher resistance regular 510 atty.
Scottbee has measured some PVs for coil voltage (the important voltage here...and is not always as high as the batt voltage), and this coil voltage depends not only on the battery voltage, but also the capacity of the batt, since this affects the current from the battery.
http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise.html
So there are other issues here, such as the current from the
batteries in each PV, but this is the jist of it.
As for atty lifetime comparisons, I don't know how long the LRs last. Lifetime is as much to do with wattage over time, as it does with how well they are taken care of over time. I have a 3.7V Bartleby, which I
LOVE, and I got 4 solid months out of my atty at 3.7V on the coil, compared to a few weeks or so with 3.1V on the coil from regular or mega 510 batts, mainly I think because the higher wattage of the Bart helped keep the atty healthy and clean. Attys on the Bart certainly preform much better, with less clogs, which as we know hasten an attys death from gunk on the coil. The LRs on 3.7V evidently get much hotter than regular attys, to the point of melting carts and filler materials, as was mentioned by someone else here. Heat over time causes the coil to lose material, eventually breaking like a fuse wire. So it might not last as long as a regular atty on 3.7V. But then you are doing similar abuse with the regular atty on 6V, so both PVs of yours may hasten atty death. I know that regular attys on the HV PVs die sooner in general, but I don't know if there is a lot of data with the LR attys since they are relatively new, and there is always user error causing attys deaths.
Hope this helps. Check out Scottbee's
thread...its what taught me about all this stuff. Remember: what is important here is not the battery voltage, but what the battery with the other things in the PV circuit end up putting across the coil.
