sub-ohm and wattage

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nath100nek

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Mar 9, 2014
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seoul korea
i have already posted this on the new member forum but copied it here since i dont know how to move it to this forum.

ok so i kinda feel stupid for posting this but kinda still ignorant with sub-ohm.
i have used the ohm calculator to see how much wattage i will get at a fresh charged imr18650 battery 30A at 4.2 volts with a mod. say im using a .14 ohm coil, then i get 30A and 126 wattage which is the maximum discharge rate for the battery... but ive been looking at the safe vaping chart and the safe wattage for 2.2ohm is 8.21watts which is pretty low comparing to 126 (Im guessing 8 watts is the safe area) if i go over 8 watts does the coil actually start burning? plus i have seen people vaping at lower than 0.1 ohms which will go over the current of the battery can draw and produce more wattage. are they just risking it? im surprised their battery hasnt blown up on them haha. i dont want that happenening to me..
 

Ryedan

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Mar 31, 2012
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Ontario, Canada
I think you got a good response in the New Members forum already nath100nek.

Just going over the main points here, the safe vaping chart assumes you're using clearos or cartos. Rebuildable attys are a whole other world of much better air flow, wicking and coil design options that can take a lot more power.

Here's a chart of batteries we consider pretty safe for sub ohm vaping with the minimum resistance for each. Stay in the yellow, make sure not to short the batteries and these combinations are pretty safe. Add a 2 cent fuse and that takes care of the short issue.

Ease down in resistance slowly if you feel like it and learn as you go. There is more than just battery safety to consider here. I have experienced a 25 watt dry hit or two that took my breath away big time. That is very likely not healthy. I am very cognizant of vape quality now and I stop vaping and fix things at the first sign of any burnt juice.

Vape on and vape safe :thumb:
 
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