So is this what all the hoopla about HD IMR batts is about? I've heard from others they can't tell the difference between HD and standard Lith-ions.
From what I can gather, this just means it's safer all around (for you, the batt, and the atty) if you use HD batts, not a vaping experience thing.
yeah really that's what it boils down to...though I do think that it's also a vaping experience thing..(for batteries smaller than 18650)
if you take a LR 510 at 3.7V your amp draw is about 2.47A...even a standard joye atty it's 1.61A...
so your max drain rates on the batteries totally change by which battery you're using...and the majority of them are below the amp draw...
so it's not actually hitting as hard the voltage sags to make it work..ie the resistance of an atty at a given voltage has a amp draw... if the battery can't provide that then it'll drop in voltage which changes the amp draw til it can satisfy that need...
18650s get past that with sheer mAh....(you can use the mAh to figure out the max drain of a battery)...
that's why it seems like an atty on a 18650 will hit harder than say a 14500... because the 14500 sags and isnt really giving you that 3.7 where the 18650 is...
the high drains alleviate that... take for example that 14500 battery... the UF 900mAh has a max drain rate of 1.3A...the AW 750mAh has a max drain rate of 1.5A (remember our amp draws from earlier?) now the AW high drain has a max drain rate of 4A
so with the high drain you sacrifice some mAh and time per charge... but it hits harder and your batteries will last longer in overall service life...
in the 18650s though you wouldn't notice a difference because even the Li-Ions can meet the amp draw easily so the high drains are overkill and all they'll provide is a shorter life between charges because of the lower mAh...
*NOTE: on the ones where there is a difference like the 14500 or the 16340...the reduced time is almost impercievable because since they do hit harder people tend to hold the button for a shorter length of time so it comes out to almost lasting the same amount of time...
*and an aditional note: on 6V or 7.4V....the max drain versus amp draw is even worse...which is why you see the reports of someone stacking 123a batteries and a joye atty in like a SB and them not working....because the amp draw is so far above the max drain rate of the batteries it trips the overdischarge protection of the batteries PCB....higher drain batteries like the AW 3V LiFePo4 and the LiMN batteries dont have that issue not just because they dont have a PCB (they don't need them) it's because their max drain rate isn't even close to being exceeded...