New Member Needing Info on Batteries and Resistance

[josie458]

I've been vaping for about a year or two. Just recently someone hooked me up with a great deal on a king mod with a Tobh atty.
I want to play safe but still get lots of vapes and great flavor. My current set up is a quad micro coil on 24guage nichrome, 8 wraps each. My battery is a MNKE IMR26650. It fires up quick and I when I took it down to the shop they checked it and I'm running at .12
My question is, is this a safe zone or could this thing blow up in my hand running this low? Generally with this battery and my rda what's is a safe reading??

If I can I'll post pictures if interested.

 

[Cullin Kin]

At 0.12 Ohms you are drawing 35 Amps with a fully charged battery at 4.2V. The MNKE 26650 is rated at 20A continuous discharge current as long as I found the right one. Your battery is orange and rated at 3500mah correct? Is this the battery? http://www.madvapes.com/mnke-imr-26650-3500mah-flat-top.html

If so, you have exceeded the continuous discharge current substantially and that can be extremely dangerous. I would remove that build immediately. It does have a pulse current rating of 60A but it is exactly what it sounds like, pulse current.

With that battery you should not go lower in resistance than 0.21 Ohms. That's even pushing it because you are maxing out the batteries continuous discharge rate. If I were you, I wouldn't build below 0.3 Ohms until you have a battery battery like the Sony VCT 26650.

Please be careful, truly. Please do some research, play around with Ohms law (V=IR), and work with Steam Engine | free vaping calculators to develop a safe build.

 

[humpstyles]

Firstly, you shouldn't need to take it down to a shop to have your ohms checked. Do yourself a favor and order an Ohm Reader for $15-20 off eBay.

Secondly, off a fresh battery (4.2v) you'd be pulling 35 amps. which would net you around 147 watts of power.

You should aim to get yourself in the safe zone of the Continuous Discharge, which is the MNKE's case is 20 amps.

With a small calculation, a build such as 4.2v / 0.21 ohms = 20amps, which would be in this case, much safer.

Education and research comes far, far before experimentation.

 

[Izan]

I've been vaping for about a year or two. Just recently someone hooked me up with a great deal on a king mod with a Tobh atty.
I want to play safe but still get lots of vapes and great flavor. My current set up is a quad micro coil on 24guage nichrome, 8 wraps each. My battery is a MNKE IMR26650. It fires up quick and I when I took it down to the shop they checked it and I'm running at .12
My question is, is this a safe zone or could this thing blow up in my hand running this low? Generally with this battery and my RDA what's is a safe reading??

If I can I'll post pictures if interested.

Welcome!
Thanks for the snort!!!!
...coffee ALL Over the keyboard....


Be careful
I

Spend some time HERE.

 

[tayone415]

I've been vaping for about a year or two. Just recently someone hooked me up with a great deal on a king mod with a Tobh atty.
I want to play safe but still get lots of vapes and great flavor. My current set up is a quad micro coil on 24guage nichrome, 8 wraps each. My battery is a MNKE IMR26650. It fires up quick and I when I took it down to the shop they checked it and I'm running at .12
My question is, is this a safe zone or could this thing blow up in my hand running this low? Generally with this battery and my RDA what's is a safe reading??

If I can I'll post pictures if interested.

You need your own ohm reader that reads to the hundredth ie: 1.25 ohms that third number can make the difference between safe and unsafe. .12 Ohms is most likely above your battery's continuous amp lamp. That is drawing 35 amps, So you are probably NOT in the safe zone. Also ohms can change at any time from the slightest adjustment so get your own.

Ohm's law | Steam Engine | free vaping calculators


YES, POST A PIC OF YOUR BATTERY.

 

[Alien Traveler]

When you get your own ohm meter you’d better check it (in the shop, for example). And you should definitely check it if you buy it from ebay.

 

[Susan~S]

Don't take this wrong but it's obvious (from the questions you are asking) that you have not done your homework. Besides all the great recommendations posted so far, I've got some additional reading for you. Safety, both for you and for others around you, is our #1 concern.

This was from a post by Baditude (our resident battery/safety expert) on another thread.

Definition of a hard short

Battery Basics for Mods: IMR or Protected ICR?
- choose the safest and right battery for your applications here. Includes a list of name brand, high-drain, safe-chemistry batteries with mAh & amp ratings in 18350, 18490/18500, and 18650 sizes.

Rechargeable Batteries
- blog post on the preferred chemistry of batteries for mods by our forum administrator and resident battery expert Rolygate.

Deeper Understanding of Mod Batteries pt 1
- what do the letters & numbers on batteries mean? What's the difference between ICR, IMR, and hybrid batteries?

Deeper Understanding of Mod Batteries pt 2
- protected vs unprotected batteries, what is Ohm's Law, inline battery fuses, what is an AW battery, stacking batteries.

Technical: Why High Drain Batteries?
- technical explanation on why high drain batteries are required for a regulated VV/VW battery device.

Question for the Tech Engineers at Provape
- explanation of battery amp limits, internal resistance, and battery chemistry pertaining to regulated VV/VW mods.

Battery Specifications and Calculators
- self explanatory.


How to Use Your Multimeter

Video on How to Use Your Multimeter

Ohm's Law Calculator

Information Resources for Your First RBA

Mechanical Mod Proper Useage Guide

 

[Baditude]

My battery is a MNKE IMR26650...when I took it down to the shop they checked it and I'm running at .12
My question is, is this a safe zone or could this thing blow up in my hand running this low? Generally with this battery and my RDA what's is a safe reading??

You are not in the safe zone with that battery (20 amps continuous) and at that resistance (0.12 ohms).

When doing sub-ohm coils especially, you have to know the amp limit of the battery. List of Battery Amp Limits

Use the Ohm's Law Calculator to determine if the coil resistance of your RBA will pull more amps than the battery has to provide. Always use 4.2 for the voltage (fully charged battery) in the calculator. Going over the amp limit of the battery can have catastrophic results. Ohm's Law for Dummies

1.0 ohm = 4.2 amp draw
0.9 ohm = 4.6 amp draw
0.8 ohm = 5.2 amp draw
0.7 ohms = 6 amp draw
0.6 ohms = 7 amp draw
0.5 ohms = 8.4 amp draw
0.4 ohms = 10.5 amp draw
0.3 ohms = 14.0 amp draw
0.2 ohms = 21.0 amp draw
0.1 ohms = 42.0 amp draw
0.0 ohms = dead short

You MUST have your own Ohm meter. Don't depend upon someone else's meter. You must check your coil's resistance before you actually fire it on a mod. It's a good idea to also have a voltage meter to insure you don't over-discharge your batteries when using a mechanical mod; a digital multimeter or an Omnitester can check both coil resistance and battery voltage.

 

[josie458]

Yup that's the battery I have. I'm glad I asked this then. I was actually afraid of getting a mechanic mod just for this reason, I tried to research about it but it's all confusing to me but with all Tue replies I got it is getting a lot more clear now. Also in my area the shop I go to is Artistan Vapes and one of the guys there when I asked him to read my ohms said "you don't really need to worry about this your battery can handle pretty much any build"
Also the reason I am so cunfused is because before I got the mod all I had was protanks and ego c twist so really I didint have to worry.

 

[josie458]

Pretty much after reading all these replies which are very helpful by the way. What I am getting out of this is that as long as you don't surpass the battery's continous discharge rate you are ok in my case it's 20A correct?

 

[rusirius]

Pretty much after reading all these replies which are very helpful by the way. What I am getting out of this is that as long as you don't surpass the battery's continous discharge rate you are ok in my case it's 20A correct?

Yes, but also keep in mind that the resistance of the coil can vary... Juice will change it slightly... After it burns off it will change slightly, etc... When you're talking about a 2 ohm coil a variance of .05 ohm isn't a big deal... When you're already down in the .2 ohm range it can make a giant difference... Give yourself some room, especially since you're just starting out... PLENTY of room... until you learn more...

 

[tayone415]

Pretty much after reading all these replies which are very helpful by the way. What I am getting out of this is that as long as you don't surpass the battery's continous discharge rate you are ok in my case it's 20A correct?

One thing to consider is that with an ohm reader it is NOT 100% accurate, and can be off 0.02-0.04 ohms. even if you compare it with other ohm readers, it can go bad out of nowhere, even without dropping it. If you want to be safe keep your amp draw at 80% or under your continuous amp draw, and in the case of your 20 amp battery that would be 16 amps or less.

 

[Baditude]

Also, the screws on the posts may have a nasty habit of coming loose and also affecting the resistance. You would have no idea that this is happening unless you have an ohm reader and routinely check the resistance on a regular basis.

 

[smacksy]

When you have a accurate ohm meter to read your resistance, and apply Ohms law, then you'll know what battery is safe for your build. For instance, my dual coil build reads .15 ohms on the meter..Ohm's law states that build will pull 28 amps at 4.2v.. So I need a battery rated at least 30 amps to be safe. But I currently use a 26650 IMR high drain batt rated at 50 amps in my big nasty mod that's plenty safe enough, with room to spare.. As long as I test my builds on the meter and obey Ohms law I've never had a problem sub ohm vaping...blow some pretty decent clouds too!

 

[WilsonWhite1992]

This is really helpfull