How much math do you mech MOD users really do?

[cramptholomew]

Or, is there sort of a rule of them that you go by (unless you're fooling around with sub-ohm stuff)? There are calculators online that will do the math for you as far as ohms/volts/watts, but when it comes to the math for amp discharge, do you do it, or just guess? I guess I'm looking for a simple explanation, or an equation, that you all use that would explain to a math-dummy how to keep myself safe. I understand Ohm's Law, but the other stuff is confusing to me.

As I understand it: say a battery is 1500mAh, and has a C rating of 10. Then the battery's discharge rate is 15Ah (1500mAh = 1.5A x 10 = 15A continuous discharge) - so I would need to keep my coils in an acceptable range for 3.7v and 15A. BUT, how does that translate into how long I can use it? If a battery has max charge of 4.2, but you shouldn't discharge it below 3.6, then you're only using about 25% of the battery capacity. So, how would I equate my resistance, to mAh?

Am I over-thinking this? I'm not stupid, I'm just bad at math - unless it's explained to me the right way. If someone is willing to work with me one this, I'd be MORE than grateful.

 

[crawler65]

Truth be told, I do no math at all. I don't use any sub-ohm attys, all my stuff is 1.7 ohms and up. I vape 'till it's not hitting good for me (usually about 3.6v) then change my battery. That's it, that's my system. I use a lot of 800mAh 18350's and 2000mAh 18650's. I have no problems with any of them.

 

[SilentEcho13]

Not much at all.

After a while, you get to know how many wraps will give you an approximate resistance.

Basically, just don't build a coil with a resistance so low that your batteries will impale your face and you're fine.

 

[bfitz]

I don't think nearly that hard about it. I use the ohm's law calculator from m.i.t. and make sure that I am in a safe amp limit for the battery. I don't do sub ohm, mostly between 1.0-1.2 so I am pretty good as far as amps go.

I look up the c ratings of the batteries and just make sure I stay bellow what they can handle. I check the battery with a multi-meter every day and when it gets around 3.5v I charge it, most of the time it is put on a charger even before that just because I don't like the way it vapes.

Generally an 18650 at full charge will last me a whole day into the next. I don't know exactly because I normally have two or three in rotation with different juices. This of course depends on how much you vape.

When I first started with mechs I wanted to figure out all of the math but soon found out it wasn't necessary for the way I vape. I am not pushing the batteries to their limits and not draining every last drop of power out of them. After a while you just get use to it. Just follow the common sense advice you see on this forum and you should be fine.

 

[Bosco]

You're definitely thinking about it more than I do, lol. I know what the amp limit is of my battery and I know how many amps the coils I usually make draw. I usually make the same coil resistance all the time . .using the same wick, wire, number of wraps, etc. Unless I am trying something new . .no math for me.

I don't know how to calculate how long my battery will last me at a given ohms .. but I don't feel the need to at all. I just replace the battery when the vape gets weak. If it's a new (or really old) battery, I measure it with the multi meter before and after charging.

I currently build ~1.2 ohm wicks - the reason why is that they seem to give me the best vape/battery life. 1.5ohms and I'm changing batteries too often. Less than 1 ohm and the vape is too hot with my current set-up. Unless you like to do math . .you can probably just experiment a bit and find what works best.

 

[E_DeCastro]

I do alot actually. I'm an ET by profession so I always calculate my amps, wattage and such. but it might not really be needed. I just want to know.

 

[bfrie]

as long as you dont go below .4 ohms your still well below 10amps, so no math for me also, i only use aw imr's and orbtronic ncr's if i go below 1 ohm

 

[cramptholomew]

I vape 'till it's not hitting good for me (usually about 3.6v) then change my battery. That's it, that's my system. I use a lot of 800mAh 18350's and 2000mAh 18650's. I have no problems with any of them.

Cool. That's what I was hoping. I'm still interested in knowing WHY and HOW, but if I can keep it simple, yet safe, that's what I'll do.

Basically, just don't build a coil with a resistance so low that your batteries will impale your face and you're fine.

LOL. I'm a play-it-safe kind of guy. I didn't used to be, which is why I am now. I just want good vapor, and a new hobby.