What Batteries are Recommended
- Thread starter JackalR
- Start date
This mod has the batteries in serial as far as I remember, so 20A it is whether one or two Efests. At 0.12 ohms and 60W the draw is almost 23A. That is above the safety limit of the Efest battery imo. Nothing you have said so far indicates that the mod will prevent this, in fact the OP has just said that he is vaping thus on the Efests.
Series- voltage of batteries gets added. 2 batteries = 4.2v + 4.2v = 8.4v
Parallel- amp limit of each battery gets added and mah limit. 30A + 30A = 60A, 2500mah + 2500mah = 5000mah.
This sigelie in question is a series box. It will cut out or show a reading that says battery low if it can not handle it. It's a series regulated device. Not unregulated, so much safer imo. You'll find that building a 0.2-0.3ohm coil and blasting it at high wattages will give you great clouds
good luck bud.
Parallel- amp limit of each battery gets added and mah limit. 30A + 30A = 60A, 2500mah + 2500mah = 5000mah.
This sigelie in question is a series box. It will cut out or show a reading that says battery low if it can not handle it. It's a series regulated device. Not unregulated, so much safer imo. You'll find that building a 0.2-0.3ohm coil and blasting it at high wattages will give you great clouds
good luck bud.
No, I am not looking at it from that perspective. According to http://www.steam-engine.org/ if you use volt then 6V on 0.15 ohms would give you 40A and 250W, which is even worse - barring the fact that the mod will not allow. I am just trying to get to the correct answer here.
Maybe @johan can help us out in the morning.
Ok, thanks, have done that. On 0.12 ohms still get 22.36A. Do, however, see that they have a "battery drain" section that gives a far lower amperage - 11.11A to be exact (they take the Efests as 35A). Not sure which is the correct one to consider in this case. I do now at least understand what you are saying, thanks. And know a lot more about this subject! With clearly more to know.
35A is the correct one to take as a Vaper. We aren't running torches or race cars to be continuous
- Series connection increase potential (Voltage), but current (Amps) the same as for 1 battery.
- Parallel connection increase current (Amps), but potential (Voltage) the same as for 1 battery.
Thanks @johan. And what would that battery's current be at 0.12 ohms on the Sigelei 150W running at 60W?
That would be contrary to all the advice I have seen so far. The 35A is pulse discharge rating and is normally measured at 1 second pulse?35A is the correct one to take as a Vaper. We aren't running torches or race cars to be continuous
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No idea Andre, as I don't know how the Sigelei internal firmware does its calculations, whether its a step down buck or sepic regulator topology. But if it does an accurate calculation the current drawn from battery should be: 22.36A
I = square root of P/R
I = square root 60/0.12
I = 22.36A
Thanks. I thought so too, but @Sprint has patiently led me to questioning this now. If I input the above on the steam-engine.org Battery drain section I get the result below. Here they differentiate between "Atomizer - what hits your topper" and "Battery drain - what taxes your battery". From this language it would appear to me that the Battery drain numbers are to be used for purposes of battery safety in a regulated mod. In this case current is shown as 15.87A for a 22A, 2500 mAh battery, which leaves ample headroom. This would mean that the setup described by the OP would also be more than safe.
Am I missing something?
@Andre at the end of the day we need full technical specifications of the specific regulated mod, before we can say battery A,B or C is safe to use, as each regulated mods internal workings differs from the next. For me personally the maximum current (A) I can draw safely from a battery is more important than the so called Drain numbers (mAh). If you want to "safely" use above on-line calculator it is imperative that you know the battery in question's C-rating.
I put the above question to Baditude, the acknowledged battery expert on ECF, as follows:
We have had a question on our little South African forum, which has resulted in conflicting answers. Turning to you, if I may, for an answer please.
Member is using a Sigelei 150W at 60W on a 0.12 ohms coil with Efest 2500 batteries. It seems to be common cause that the continuous discharge rating of this Efest is 20A. Question was: Is it safe to use this Efest battery for said scenario.
Going to the Battery Drain section of steam-engine.org the current draw is shown as 22.36A under Atomizer (what hits your topper), which clearly is too high for the 20A of the Efest.
But under Battery drain (what taxes your battery) the amperage is shown as 15.87A, which seems safe for the Efest under discussion.
Which one of these answers is the best to use when considering battery safety under said scenario?
His answer:
The purple Efest 2500mAh 35 amp battery is actually only a 20 amp continuous discharge rated battery when independently tested. Please see Purple Efest Batteries Not as Advertised. Using this battery for any sub-ohm use is way over its true specification and NOT SAFE to use below 0.4 ohms.
When figuring out the amp draw of a homemade coil using the Ohms Law calculator, I use only the "continuous discharge rating", not the "pulse" rating, as pulse ratings are usually different for different manufacturers and vendors so not reliable across the board. Continuous amp ratings are an industry standard across the board.
Explain it to the Dumb Noob: Ohm's Law Calculations
Please advice these vapers that they need to use a true 30 amp battery, which currently is only the Sony VTC 4/5 and purple Efest 2100mah 30 amp (a re-wrapped Sony vtc4). Coils should be made to at least 0.25 ohm for any battery on the market. Lower ohm coils are at user's own risk.
Your question was well packaged @Andre
And thanks for sharing - as well as Baditude's answer
I wonder if using a regulated in some way makes it a bit safer?
But i like the outcome summary advice - stick to 0.25 ohms and above - and you'll be safe with the Efest 2500 mah.
@Yiannaki made me a 0.2 ohm coil on my Doge, which I fired on the Sig 100W at about 80W. Had two Smurfs in there (in series). Its not a pleasant all day vape, just for clouds - but i think I am going to make the ohmage a bit higher - and stay safe. Regulated or not. My Reo LP hasnt gone below 0.35 and is now at 0.5. My blackbird Reo doesnt go below 0.45. All with Efest 2500 mah. So good to know i am safe on that front.
And thanks for sharing - as well as Baditude's answer
I wonder if using a regulated in some way makes it a bit safer?
But i like the outcome summary advice - stick to 0.25 ohms and above - and you'll be safe with the Efest 2500 mah.
@Yiannaki made me a 0.2 ohm coil on my Doge, which I fired on the Sig 100W at about 80W. Had two Smurfs in there (in series). Its not a pleasant all day vape, just for clouds - but i think I am going to make the ohmage a bit higher - and stay safe. Regulated or not. My Reo LP hasnt gone below 0.35 and is now at 0.5. My blackbird Reo doesnt go below 0.45. All with Efest 2500 mah. So good to know i am safe on that front.
He actually says the Efest 2500 is not safe below 0.4 ohms, but his safety margins are very conservative, even for me.
Does any of these high wattage devices have the batteries wired in parallel? This will allow each battery to supply half the required amps. There does not seem to be any batteries that can supply 150W on some of these mods if the batteries are connected in series.
Quite a few mechanical ones (like the Dimitri), even seen one where you can switch between series and parallel, but have not seen a regulated one wired for parallel.
I'm really concerned about this now as I have just ordered a Sig150 and 2 x Smurfs...
I am wondering if I should have gone for 2 x Sony VTC4 instead, or Purple Efest 2500's
Shucks...Don't know what to do
Some interesting forum reads here on the subject:
http://vapingunderground.com/threads/sigelei-150w-batteries-help.44520/
and
(near the end of the thread re Sony and Samsung)
http://www.reddit.com/r/electronic_cigarette/comments/2sfj4m/batteries_to_use_for_sigelei_150w/
I am wondering if I should have gone for 2 x Sony VTC4 instead, or Purple Efest 2500's
Shucks...Don't know what to do
Some interesting forum reads here on the subject:
http://vapingunderground.com/threads/sigelei-150w-batteries-help.44520/
and
(near the end of the thread re Sony and Samsung)
http://www.reddit.com/r/electronic_cigarette/comments/2sfj4m/batteries_to_use_for_sigelei_150w/
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