My rda mech mod setup?help

[Pierre Marios]

Okay I’m a new for the rda mech mod
Im using a q30 samsung 3000 mah battery And im gonna be using .30 ohm coil at 4.2 volt and 14A around 58 watts and i got question what happen when my battery drain like in 3.7 and how do i know when i have to charge
what do you guys think i got this math from ohm law
here more specs about my battery

• Brand: Samsung SDI
• Model: 30Q
• Size: 18650
• Nominal Capacity: 3000mAh
• Nominal Voltage: 3.6V
• Maximum Voltage: 4.2V
• Discharge Current: 15A Maximum Continuous
• Style: Flat Top
• Protected: NO, UNPROTECTED
• Approximate Dimensions: 18.33mm x 64.85mm

My mod is the pro mech 2

 

[greek mule]

You forgot to mention you bought the battery from Ebay.
Vgod mesh pro 2 setup help!

 

[icepickmaker84]

I use 30q’s in my regulated mods but wouldn’t use them in a mech because I’m overly cautious. I stick with VTC5A’s for single mechs.


Sent from my iPhone using Tapatalk

 

[gpjoe]

Your math looks right, but if your battery is only capable of safely discharging at 15-amps (assuming it is authentic), I personally think you are running it too close at 14-amps. I like a bit more headroom for safety's sake. THEORETICALLY, you would be fine, but a little too close for comfort, IMO. I would be much more comfortable with at least a 20-amp battery.

Just to be clear: I would NOT use that battery with a .3-ohm load, and would up the resistance to at least .5-ohms.

 

[charlie1465]

I agree with @gpjoe your continuous discharge rating is 15 amps and your 0.3 ohm build equates to 14 amp.

4.2/0.3 = 14 That's too close to your continuous discharge rating. Obviously, it's up to you but I would get some better batteries or as has been said up your coil resistance a bit

To answer your other question it's common sense really....when you start feeling the power waning change it up for a fully charged battery. If you have an intelligent charger you can always see what the rating is there but TBH most people just do it by feel. It's easy to tell you have extreme voltage drop.

Good luck to you and don't forget to check out mooch's recommended battery lists here...

Mooch's blog | E-Cigarette Forum

Happy and safe vaping

 

[Pierre Marios]

I agree with @gpjoe your continuous discharge rating is 15 amps and your 0.3 ohm build equates to 14 amp.

4.2/0.3 = 14 That's too close to your continuous discharge rating. Obviously, it's up to you but I would get some better batteries or as has been said up your coil resistance a bit

To answer your other question it's common sense really....when you start feeling the power waning change it up for a fully charged battery. If you have an intelligent charger you can always see what the rating is there but TBH most people just do it by feel. It's easy to tell you have extreme voltage drop.

Good luck to you and don't forget to check out mooch's recommended battery lists here...

Mooch's blog | E-Cigarette Forum

Happy and safe vaping

Thanks and what battery/coil you recommend me to use with q30 or another kind of battery

 

[Pierre Marios]

You forgot to mention you bought the battery from Ebay.
Vgod mesh pro 2 setup help!

Yeah and i told u that i made sure that its original

 

[charlie1465]

Thanks and what battery do you recommend and what coil you recommend me to use with the q30

As I said it's up to you but even if you went to 0.35 your amp draw would be 12 leaving you a reasonable margin of error (imo).

With regard to batteries just have a look at the lists from Mooch that I linked to and choose one with the highest continuous discharge rating (CDR) and then you'll be able to build as low as it can ever be with an 18650.

If i'm honest i'm being very safe and IMO it'is better to answer these sorts of questions with safety and margin of error in mind.....will your battery blow up if you go ahead with your suggested coil/s and battery? Probably not. Could it possibly? Yes

It's always better to err on the side of caution rather than pushing things right to the limits. You can still get a decent vape so there's no reason not to be safe...i'd hate anything bad to happen to anyone here...especially after giving advice

Hope this helps and good luck to you...stay safe

 

[Pierre Marios]

Your math looks right, but if your battery is only capable of safely discharging at 15-amps (assuming it is authentic), I personally think you are running it too close at 14-amps. I like a bit more headroom for safety's sake. THEORETICALLY, you would be fine, but a little too close for comfort, IMO. I would be much more comfortable with at least a 20-amp battery.

Just to be clear: I would NOT use that battery with a .3-ohm load, and would up the resistance to at least .5-ohms.

You mean if i use my setup .30 with a 20 amps battery it will be safer?

 

[charlie1465]

You mean if i use my setup with a 20 amps battery it will be safer?

The thing is with your 15 amp battery being ran at 14 amp means that everything about the battery has to be perfect...so know manufacturing defects, bad batch, accidental sending out of a reject etc, etc,...this is why we say only buy your batteries from a trusted source. Ebay is known for fakes so it is risky...

Are you getting the point here....it's just about your margin of error.

 

[Eskie]

A Samsung 25R is a reasonable choice with a 20A rating and 2500 mAh. It's a good workhorse. For mech use while not a necessity unless you lean toward building lower resistance a VTC5a would be an excellent choice with a 25A CDR and 2600 mAh rating. If you're going to push it the Samsung 20S will offer you 30A and still have 2000 mAh. Before that there were only LG batteries that could support 30A at the expense of only a 1500 mAh capacity.

As to recharging it all depends on you. When the vape feels too weak or cool it's time to recharge. There is variation among folks on what they'll accept. I'm not a fan if a hot vape so I build for more of a warm vape at full charge, 4.2V. That does mean I find it getting too cool at as high as 3.7-8 V, which is quite early in the charge of a battery. If you build your coil aiming for a good vape at the nominal 3.7V, it will be quite warm when you start out with a fresh battery, but if you find that still comfy you'll get much longer run life than I do. It's all personal preference and your only control over your vape experience is how you select and build your coils.

 

[Pierre Marios]

The thing is with your 15 amp battery being ran at 14 amp means that everything about the battery has to be perfect...so know manufacturing defects, bad batch, accidental sending out of a reject etc, etc,...this is why we say only buy your batteries from a trusted source. Ebay is known for fakes so it is risky...

Are you getting the point here....it's just about your margin of error.

Thanks for helping me really and im sorry for being stupid i just got the rda but i checked it with the ohm law i have to use the 0.28 to get 15 amps but does it mean when the battery goes down it will change the amps?

 

[charlie1465]

Thanks for helping me really and im sorry for being stupid i just got the rda but i checked it with the ohm law i have to use the 0.28 to get 15 amps but does it mean when the battery goes down it will change the amps?

No you're not being stupid at all, quite the opposite. It shows intelligence to ask when you're not sure about something

Your maths/ohm's law are perfect. To vape safely you must be under your batteries CDR. That's 15 amps so you were correct in your math's. The reason I said what I said was because drawing 14amps from a battery with 15 amps max didn't leave much room for a fault on the battery.

I hope that's clear

 

[greek mule]

does it mean when the battery goes down it will change the amps?

Yes, this is why your vapor production decreases as voltage goes down.

 

[Pierre Marios]

No you're not being stupid at all, quite the opposite. It shows intelligence to ask when you're not sure about something

Your maths/ohm's law are perfect. To vape safely you must be under your batteries CDR. That's 15 amps so you were correct in your math's. The reason I said what I said was because drawing 14amps from a battery with 15 amps max didn't leave much room for a fault on the battery.

I hope that's clear

Yeah and i checked the battery drain with a .28 ohm it left me with 0%headroom but when i changed it to 0.50 it shows me
44 % headroom with green light but if what does that mean? If i use a 0.50 it will left me with a good headroom but it will leave me with 8 amps and I can’t use that on my battery no? Or its just totally fine?

 

[charlie1465]

Yeah and i checked the battery drain with a .28 ohm it left me with 0%headroom but when i changed it to 0.50 it shows me
44 % headroom with green light but if what does that mean? If i use a 0.50 it will left me with a good headroom but it will leave me with 8 amps and I can’t use that on my battery no?

Yes that's fine for your samsung 30Q. Your battery has a continuous discharge rating of 15amps so any coil that you use should draw less than that.

If you are going to make a coil at 0.5 ohms it will draw... 4.2/0.5 = 8.4 amps so that's fine.

 

[Pierre Marios]

Yes that's fine for your samsung 30Q. Your battery has a continuous discharge rating of 15amps so any coil that you use should draw less than that.

If you are going to make a coil at 0.5 ohms it will draw... 4.2/0.5 = 8.4 amps so that's fine.

thankd you sloved my problem

 

[Pierre Marios]

Yes that's fine for your samsung 30Q. Your battery has a continuous discharge rating of 15amps so any coil that you use should draw less than that.

If you are going to make a coil at 0.5 ohms it will draw... 4.2/0.5 = 8.4 amps so that's fine.

One last question do you have any idea when i have to stop vaping with battery i mean when its time to charge it?

 

[charlie1465]

One last question do you have any idea when i have to stop vaping with battery i mean when its time to charge it?

Yes, when the vape starts feeling like it's lacking for you it's time to change the battery. It's up to you to just feel when it's ready. That's what I do.

Bon continuation

 

[Pierre Marios]

Yes, when the vape starts feeling like it's lacking for you it's time to change the battery. It's up to you to just feel when it's ready. That's what I do.

Bon continuation

And when the battery is on 2.5 i should stop using it and charge it up right? and it’s safe when the battery goes down right? It doesn’t change something in the setup smth like that? Im really sorry for asking too much you know I don’t wanna be on the news for vape explode