Batery Questin

[aceofspades991]

Hi all,

I'm new to the forum and I have been vaping and off cigs for about a year.

I have read plenty of threads where people who are new to vaping and have not done their reaserch were (wisely) advised against doing their own builds so I'll provide a brief into below.

I started out using the Halo Trident but I was not satisfied witht he vape the tank system produced, so I started using cartomizers with drip tips. Eventually I got tired of spending money on cartomizers and often times one cartomizer would hit differently to the others. A couple weeks ago I met someone with a mechanical mod and he explained how it worked. Since then I have been doing a lot of research and yesterday I went to my local vape shop to purchase a mod. I ended up buying a stingray and an Igo t atomizer. I was hoping to get guidance with build saftey but was disappointed when the employee built me a daul coil build without testing it. I asked if they had a tester which they did and he tested it and it came out to 0.6 ohms. Once again I was annoyed because I had asked him not to build a sub ohm coil because of the potential safety issues. He proceeded to tell me the talk about battery safety was bs and he had built coils to 0.1 ohms without an issue so I took my stuff an left.

Anyways, my question is, I purchased a purple Efest 2100 mAh battery and on the wrapper it says "discharge current 30A (will last 75 seconds at 60A). Is the discharge current the rate at which the battery will safely produce power? In other words, using the formula Resistance=Volts/Amps (R=4.2/30) will this battery power a 0.14 ohm coil? Please know I have no intention of running a coil that low or building something that is on the verge of exceeding the safe limits, I just want to make sure I am not misunderstanding the limitations of the battery.

Thanks in advance for any replies. I really appreciate all of the great info on the forum!

Ace

 

[williamclarkonet]

Thanks for the info it helped me alot

 

[aceofspades991]

I'm glad something I said was useful to you but please realize what I said about battery ratings still needs to be confirmed by someone more experienced then me (hence the reason for my post).

 

[twizted]

A .14 ohm coil @ 3.74 volts comes out to 26.7 amps. I wouldn't push it that close but by the numbers you should be fine. Take your volts divided by ohms gives you your amp draw.

Sent from my Nexus 10 using Tapatalk

 

[NealBJr]

What you said is true... however, keep in mind these are maximums. Yes, they CAN go that low, but also keep in mind that's on a freshly charged battery in optimal shape. I personally don't like to run anything that low myself.

Keep in mind, those batteries are not designed for Ecigarettes, instead they are designed for other applications. Ecigarettes have just "borrowed" the technology from other applications. With Ecigarettes, it's not as controlled as, say, an advanced laptop power regulation device.

So, yes, you can run that low, but I wouldn't come close to it due to too many other factors. Running a battery at it's maximum potential is asking for problems. One drop of the mod, one coil wrap that is tighter than usual might cause unexpected results. Personally, I like to only use half of the battery's potential just to be safe.

Also keep in mind that running the battery at it's maximum, or even close to it's maximum will shorten the lifetime of the battery. Running it for it's pulse rating is not a good thing, but it's there for safety. There have been times that I put my mod down, only to pick it up later to find out it was firing for several minutes straight. If I was running it close to the maximum, chances are the battery would have overheated thermally.

Can you run a deep sub-ohm safely? yes... with proper monitoring it can be done fairly safe. However, the ratings are there to give you a general guideline of how safe the battery is in relation to an off-brand or other battery builds. I feel more confident running a .6 ohm coil on a 30A than a 20A, even though with both of them I'm not coming close to the maximum potential. I rarely use the manufacturers rating, but I rely on people who have hooked it up to testers and actually tested it. I then ask for real world experience, and THEN I decide. I use a Ohms Law Calculator for quick calculations, and use 4.2v for the calculations.

Everything you said was true, but not advised. And when someone tells you to ignore any safety warnings, I'd be leary about taking that guys advice in the future. It's that kind of mentality that hurts people. I've stopped shopping at a vendor because I saw someone sell a mechanical mod to someone who knew absolutely nothing about mechanical mods or Ecigarettes... They sold him a mechanical mod, 30a battery, coil, coiled his first dripper and sent him on his way... before he left, he held up an 18650 and said "where do I put the battery in this?"... he had to be told that the 18650 WAS the battery.

I'm not his mother, I'm not the Electronic Cigarette Police, nor do I run their business... but if they're willing to not offer any information to someone or give any guidance to that sale, what's to say they'll give any correct information or guidance to anything *I* buy.


Just my thoughts.

 

[aceofspades991]

Thanks for confirming my thoughts. As I said I have no intention of going that low, I just wanted to know what the limits are.

 

[DaveP]

If a car will do 120mph at 6000 RPMs, is it safe to do that even it that's the max RPMs the motor will withstand according to the manufacturer?

Sorry for the tongue in cheek analogy, but it's truth. I'd much rather use a battery with a C rating of 30 amps in a far lower range. Leave yourself some breathing room. There's plenty of good flavor and vapor in the 10 to 15 amp range. Most of us don't exceed 10 to 15 watts.