how much buffer zone below your batt's max Amp/Watt limit do you build with a mech mod?

[veganvap]

Suppose you have a 10A 40W limit battery. What's the highest you'd let an Amp calculator calculate for the resistance you built your coil and at 3.7 volts?
For example, would you never vape anything that calculates to be more than 8A or 35W just to have that safety buffer in case something changes? Is it more like don't go over 9A or 38W or is it more like don't go over 6A or 25W?

I know when vaping just protanks that my coils get lower in resistance as I use them through being gunked up somehow the gunk aparently becomes conductive and my ohms lower. I'd imagine I built a .3 sub ohm and it got gunked and lowered in resistance that it could cause a mechanical mod to possibly exceed the battery limit.

 

[pdib]

Most importantly, a fully charged battery is at about 4.2 volts (often a bit less). If safety is your goal, do your calculations with that number.

 

[Thrasher]

Most importantly, a fully charged battery is at about 4.2 volts (often a bit less). If safety is your goal, do your calculations with that number.

+1 you have to always start with a fresh charge voltage when calculating.

personally as long as im safely under limit i try to tune more for a reasonable battery life
also the hard limit, say 10 amps, is for continuous draw. meaning the battery should be able to handle being run at 10 amps until drained ( i wouldnt want to test it though)

most 10 amp batteries have a quick pulse (5-6 sec press) limit around 18 amps. as a safety measure for unexpected spikes.