Some serious building and battery questions

[Ladiekali]

I dont want to blow up.

Ok so i was sold a nice chi you clone and a igow 3, and its a quad. But i dont use it. Thank god.
i am using an octopus built with cotton at 1.3 ohms and i i have a igow on the way.....
i only use aw imr batteries, because baditude said so lol except for the one battery the shop sold me with the chimyou clone. But he never told me not to use my other small 18350‘s.

i just found out tonight not to use my little batteries...oops Omg ok. Wish the shop told me that.

ok first question, at what ohms are you sub ohming?

if i build a dual coil at about .7 or .8 what is a safe way to use this with out fear of blowing up?
Like what size battery is ok? Or is any ok because its high enough ohms?

is there a dummies guide to knowing your amperage needed?
Like a simple formula or something similar?

I understand my small batteries dont have high enough amps ok
how do i know or figure out what ohms is safe for it?

i think i need some of this info kinda summed up. Im getting brain fried here.
like too much information.

Im not into sub ohming, i just want to build my own coils and change my flavors frequently in my rda's and still get a nice hit.

i also dont want to share misinformation.

help?

please.

 

[MamaTried]

good place to start
http://www.e-cigarette-forum.com/fo...op-reference-shop-new-experienced-vapers.html

 

[Ladiekali]

Thanks, hadnt come across that one yet! Off to do some reading!

 

[Mikey6]

Since you're off reading, you may have some across this already but it's a must have bit of knowledge. Amps are volts / ohms. 4.2 volts / 0.5 ohms = 8.4 amps. Stay at about 70% of the rating for safety (that's the cushion I give myself). So if you have a high drain like a Sony 18650vtc4 with a 30 amp rating, I would only go to 21 amps, or 0.2 ohms. Be safe and smart. Sorry if that got long winded.

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[indoorsindica]

Since you're off reading, you may have some across this already but it's a must have bit of knowledge. Amps are volts / ohms. 4.2 volts / 0.5 ohms = 8.4 amps. Stay at about 70% of the rating for safety (that's the cushion I give myself). So if you have a high drain like a Sony 18650vtc4 with a 30 amp rating, I would only go to 21 amps, or 0.2 ohms. Be safe and smart. Sorry if that got long winded.

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Short and sweet imo

 

[TrentTC]

Be careful getting into sub ohms. Just make sure you know the specs of your batteries. Most should tell you what the maximum continues discharge of your battery is in amps. Otherwise your battery will have a C rating. If it has this you can take the MAH of the battery divided by 1000 and then multiply that by the C rating. This will give you the maximum discharge in amps. A .7 ohm coil pushes 7 amps at 4.2 volts so you'd need a battery that is capable of that at least. You can use ohms law to figure out how many amps your build will pull from your battery. It's a lot of information but you need to have it down in order to build to .7 ohms. It's always better to know yourself whether what you're doing is safe rather than having to ask other people. An AW IMR 18350 700 Mah has a maximum discharge of 6 amps. If you want to build coils that are sub ohm make sure you use 18650 batteries. An AW IMR 18650 2000 Mah battery has a continuous discharge rating of 10 amps. The 1600 Mah version has a rating of 24 amps. There is also MNKE 18650's that have a 20 amp rating and Sony VTC batteries that have a rating of 30 amps. These batteries can go as low as .2 ohms and still be relatively safe. It's all up to you though. Research what you're doing at your own pace so as not to get overloaded and only go as low as you are comfortable with

 

[Ladiekali]

Unrelated post

 

[Ladiekali]

Since you're off reading, you may have some across this already but it's a must have bit of knowledge. Amps are volts / ohms. 4.2 volts / 0.5 ohms = 8.4 amps. Stay at about 70% of the rating for safety (that's the cushion I give myself). So if you have a high drain like a Sony 18650vtc4 with a 30 amp rating, I would only go to 21 amps, or 0.2 ohms. Be safe and smart. Sorry if that got long winded.

Sent from my SCH-I605 using Tapatalk

Ahh thanks for this! This was wayyyy easier to understand.

 

[Ladiekali]

So volts divided by ohms is your amps, so then you need to know your batteries amp limit?
Am i right so far?

So take the mah of the battery...divide by 1000, and multiply by c rating.

And im sorry what is the c rating? Where is it on the battery?

I think im still missing something here,

I have to learn this because i start working for a vape shop soon and i cant go i. There not really understanding this.

 

[Apple Grocer]

C-rating is a way to give you the maximum amp draw of a battery as well as how long it can sustain that amp draw.

For example:
An AW IMR 18650 1600mAH is rated at 15C

(1600/1000)*15= 24 amps. This is the maximum amp draw for an AW IMR 18650 1600 mAH.

But, because we know the C-rating, we know how long this battery can sustain that amp draw. A 1C batter can sustain its maximum dishcarge rate for 1 hour, a 2C rated batter can sustain it for 1/2 an hour, a 10C rated battery can for 1/10 of an hour.

So our 15C AW IMR 18650 1600mAH can sustain a maximum drain of 24 amps for 1/15th of an hour, or 4 minutes.

Batteries will either give you the maximum discharge limit in amps, or they have a C-rating.

It has already been said, but this bears repeating, especially if you are about to work in a vapor shop. Running your batteries at their max amp draw is not really safe, for any amount of time. Play it safe and give yourself some headroom.

 

[Ladiekali]

Wow.
Thank you for this.
Im still reading up on this, now i can reread some things and i think i will have a better understanding of what i am reading.
Thank you for the break down it is appreciated guys. I think i was getting overwhelmed.

 

[Slobalt7]

Yeah, don't be like me listening to a local shop owner who sold me an Efest 2000MAH saying it was 30 amp... Then pushing a .3 on it wondering why 2 hits in the battery holder was almost too hot to hold... A week later I got some Efest 1600's because they were really 30A because I did some research on the subject and the mod gets lightly warm through the day.