Question about high voltage

[Danny55]

Hi guys. Probably some dumb questions here but I need to ask anyway.

I've currently got a kayfun with a 1.8ohm coil and a TFV4 with a 0.8 ohm coil. At 50w, (the max for my sigelei mod), the kayfun is 8.5v and the TFV4 is 6.3v. Also, on my subtank mini, I built a 0.2 ohm coil which when I last used it, I think at 50w it was only about 3.4v or thereabouts I think.

So they all put out the same wattage but should I be worried vaping at over 5v? I mean, is 8.5v dangerous as far as battery safety or in any other way, or is it simply draining the battery faster? Presumably the vape at 50w will be equally warm on all devices and not affected by the voltage being too high at over 5v, or low like 3.4v?

Perhaps it's a case of, if I want to vape at higher wattage, it's better to go lower resistance so that it doesn't drive the battery too hard, i.e, using higher voltages?

 

[bacc.vap]

As far as voltage goes, check out the specs for your mod, if things are within it's range, no problem. I'm no regulated mod or Sigelei expert, but it's interesting that you are not actually vaping at the same wattage for each of those setups, assuming you're set to 50watts for each. 1.8 ohms@8.5v is actually 40w(4.7amps), 0.8ohms@6.3v is 50w(7.8amps), and 0.2ohms@3.4v is 58w(17amps). Which mod are you actually using, is it max 50 watt, if so something's not right there.

I wouldn't worry so much about the voltage, assuming it's within spec, just make sure your batteries can handle the amps they need to put out. Like I said I'm no expert on regulated mods, mainly just making an observation about the wattage on your different setups. Maybe someone else could explain that situation to both of us.

 

[Danny55]

Thanks bacc.vap. Yeah, it's a Sigelei 50w mod. The specs are
Variable Wattage:7.0W – 50.0W
Atomizer Range:0.2Ω-3.0Ω
Battery Capacity Range: 3.2v – 4.2v
Output Voltage Range :1.2v-8.5v
Battery:18650

I'm using a 30A Sony VTC5. Yeah sorry, I just screwed my 1.8 ohm kayfun back on and realised that it's showing 40w at 8.5v. The mistake I made was that when I screwed the kayfun on and notched up to the maximum 8.5v, it still showed 50w until I pressed the fire button and then it changed to 40w (at 8.5v).

Actually, I think I need to tighten the coil screws down as the resistance and wattage is fluctuating a bit between 1.8 and 2.1 ohms and 36w to 40w. I'll have to check my subtank mini again too, it must have shown less than 3.4v then, as it can only go to 50w.

 

[bacc.vap]

That's good, your mod is doing it's job by not going above 8.5v. Now what's the deal with that 58w?

 

[IMFire3605]

If I remember, the Sig50watt is single battery?? Correct me if wrong.
That VTC5 is not really 30amp CDR it is 20amp CDR, where the VTC4 is 20 to 25amp CDR flexible to 30amps, and the VTC3 is true 30amp, more mAh you have less amps are actually in the battery, but the VTC5 does handle up to 25amp CDR from time to time very well like the VTC4 can be pushed to 30amps, solid battery line.

Thing to remember with regulated mods is amp draw is not like a mech, where a mech max amp draw is at fresh charge (4.2v) a regulated max amps are at lowest battery charge (between 3.2 and 3.5v depending on model). The Sig50watt, 50watts is 50watts if it is capable of boosting the voltage high enough, 8.5v being the max boost it is capable of, so the 1.8ohm coil is not fully 50watts. 50watts/3.2v=15.625amps is the max amps the mod will ever ask of the battery at this stage by Ohms Law formula, but the boost circuit uses raw amps to make into extra voltage, to get to 8.5v from 3.2v consider that extra 5amps into the equation to be converted to raw voltage, you are at 20amps, still in safe CDR the VTC5 can provide, the mod chipset will most times auto shut down if the CDR is to high for the battery inside due to temperature sensors for the battery and chipset itself. Unlike a mech, the Sig50watt most times will not let you do more than it is capable of or you are not aware of.

You are well within the safety specs at the moment, feeling a little safety conscious, you can upgrade to the Sig100watt, Sig150watt, or Sig Fuchai200watt, double batteries in series, 8.4v full charge 6.4v lowest charge less amp draw on each cell, that or upgrade the batteries to VTC4, VTC3, Samsung 25R, LG HB6, LG HE2/HE4's, with the VTC4 and Samsung 25R best bet of balance of CDR with decent mAh and strong workhorses, thus why they are so popular, the VTC3 and HB6 are true 30amp CDR though low mAh, the HE2 and HE4 lower on the list under the VTC4 and 25R, even the LG HG2 is good up to 65watts like the more popular 20amp batteries (HE2/HE4, VTC5, VTC4, 25R), even the Samsung 30Q (15amp CDR) is good and safe up to 50watts and has the same 3000mAh the HG2 has.

Link in my signature I've broken down a list of wattage ranges the best batteries on the market can handle easily and safely

 

[SVrider]

Am i missing something here? 50 watts on a 1.8ohm coil in a kayfun, wtf?

 

[Danny55]

Thanks IMFire, I think I got the gist of what you said, though a bit technical for me

Am i missing something here? 50 watts on a 1.8ohm coil in a kayfun, ...?

Well, 40 watts. I don't vape it at that, I vape it around 12 to 15w.