KingPin!
In my defence, I was left unsupervised ^^
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Hi All,
Seems other than "help my mod isn't firing" the most asked question seems to be "what battery should I use when trying to use X resistence or X wattage on my regulated mod"
There are loads of good reference materials out there which I'll post links for after this initial post (after much research myself)
Note: This post is not intended as "be all and end all" about battery safety so please research other safety aspects seperately (for instance mooch's blog - link posted below), it's about choosing the correct battery and resistence build with an explaination on how each is working on a regulated mod
Note2: I've sourced the information in this thread from multiple sources and stitched it together with working examples in one place for easy reading - I'm not professing to be an authority when it comes to batteries I would refer you to mooch in this regard. I have given credit with associated links to people I sourced material from... a great video with a wide range of material to watch is:
So onto the thread itself ....I thought it would be a good idea to list out the mods or common chips used in mods and the current drain at max settings you'll need to cover. Of course with a caveat that I advise you to double check and carry out your own research
First to dispel some myths though ...regulated mods work on a 2 circuit basis, as such you are interested in the "input" information which believe it or not has nothing to do with the resistence of your coil when trying to determine battery safety. This input circuit is between the battery and the regulator (or chip), rather than "output" circuit between the regulator and the atty (coil) this is in direct contrast to mechanical mods where resistence is of upmost importance as the battery and atty are shared in 1 single circuit.
In terms of battery safety unlike mechanical mods, regulated mods draw more current as the battery voltage decreases to meet the wattage (VW mods) or voltage (VV mods) demands you set on the mod. Once these demands are no longer met the mod will display the low battery message and refuse to fire (in most case where there is low voltage protection built in).... it's this bit we are interested in as the max current drain will be where this happens so in terms of safety you need to be sure you use batteries that can cover this.
There are other things impacting the input information i.e. battery sag, where a batteries internal resistence needs to be taken into consideration I.e a battery at 3.2v might only delivery 2.8v-3v due to this sag (see reference material 8)
Also chip efficiency is important to the input as the chip takes some additional current on top of your setting to power the chip itself i.e a 90% efficiency means it needs an additional 10% power to function
You can calculate this input information yourself It's an extension of Ohms law I = P / V
If you list everything out you need to know:
Mods Max Wattage (A)
No. Batteries in the Mod (B)
Low Voltage Cut off (C)
Sag buffer% (D)
Chip Efficiency% (E)
(N.B some of these we can assume if you're not sure but does means the calculation is more of an approximation so extend some of the figures to more extremes)
Put another way if you want to manually calculate this:
1) Max wattage of mod / no batteries in mod = max wattage per battery
2) low voltage cut off - (sag buffer%) / no of batteries = low voltage per battery
3) max wattage per battery / low voltage per battery /chip efficiency = Current drain
Note: Dividing by the number of batteries ignores whether a mod is wired in series or parralel hence why it's done
For example
1) The Smok HPriv is 220w,
2) uses 2 batteries,
3) has a low voltage cut off of 6.4v
4) but I'll put 5.6v (with an assumed 12% sag buffer),
5) and since I don't know the chip efficiency I'll assume it's 90% to err on the side of caution....So this is
1) 220 / 2 = 110 max wattage per battery
2) 6.4 - (6.4/100*12) /2 = 2.8 low voltage per battery
3) 110 /2.8 / 0.9 = 43.65amps drain per battery
Holy shit 43.65amps per battery! Yep ....now the Smok chip will kick in and limit current draw before this level (bucking and/or boosting) and deliver what it can in pulses but that's a whole load of drain and stress on the chip to cover without the right battery!... problem is you try and find a 18650 with this much CDR! (And is another reason a lot of people say that 220w is a load of bollocks on a dual battery mod... not unless it's in microsecond bursts youre more likely to get something closer to 167w)
All this aside and knowing I don't vape above 110w on my device I can change that 220 to 110 which now gives me 21.82 amps per battery drain much more acceptable right!
Knowing this information allows you to purchase the right battery with the appropriate Continious Discharge Rating (CDR) to cover the amps like the above example. At 110 wattage I might want something like the Sony VTC5A with a CDR of 25, and may even choose this battery when vaping at lower wattages on that mod just in case I push it one day, or to place less stain the mods chip and battery.
It's always better to have additional CDR in reserve where you can and vape within safe wattage limits
Reference material:
1)http://blog.thevaporist.org/2015/12/29/regulated-mods/
2) https://www.e-cigarette-forum.com/f...ngs-picking-a-safe-battery-to-vape-with.7447/
3)https://www.reddit.com/r/electronic...you_dont_calculate_current_draw_on_regulated/
4) https://www.e-cigarette-forum.com/f...attery-current-draw-for-a-regulated-mod.7532/
5) https://www.planetofthevapes.co.uk/...lating-amp-load-using-a-regulated-mod.128294/
6) http://vapingunderground.com/blogs/for-the-new-and-inexperenced-vapor.16/
7)http://vapingunderground.com/threads/anthony-vapes-presents-vaping-safety-101.300140/
8) https://www.e-cigarette-forum.com/forum/blog-entry/what-is-battery-internal-resistance.7569/
Acknowledgements for our members who have helped me form this thread knowledge they have posted/shared with associated links above
@gbalkam
@conanthewarrior
@Mooch
@f1r3b1rd
@SirRichardRear
Mooch also runs a blog with some excellent material including other aspects of battery safety well worth taking the time to read this
https://www.e-cigarette-forum.com/forum/blogs/mooch.256958/
So without further ado (all are 18650 devices at max wattage)
All devices at max settings:
Hohm Wrecker 151w (98.8% efficiency, 12% sag)
=27.29 amps per battery
Hohm Wrecker G2 171w (98.8% efficiency, 12% sag)
=30.91 amps per battery
Hohm Wrecker Slice 101w (assumed 90% efficiency, 12% sag)
=40.08 amps per battery (takes single 26650 battery)
Smok (Assumed chip efficiency at 90% and sag at 12% accross all of the below)
HPriv 220w = 43.6 amps per battery
Alien 220w = 43.6 amps per battery
X cube Ultra 220w = 43.6 amps per battery
X cube 160w = 31.75 amps per battery
DNA 250 devices (97% efficiency, 12% sag)
= 30.68 amps per battery
DNA200 devices (97% efficiency, 12% sag)
= 24.55 amps per battery
DNA167/166 Devices (97% efficiency, 12% sag)
167 = 30.74 amp per battery
166 = 30.56 amps per battery
DNA 75 devices (93% efficiency, 12% sag)
= 28.8 amps per battery
YiHi SX475J devices (92% efficiency, 12% sag)
= 29.11 amps per battery
YiHi SX550J devices (96% efficiency, 12% sag)
= 37.2 amps per battery
YiHi SX450J-BT devices (95% efficiency, 12% sag)
= 37.59amps per battery
YiHi SX350 J-V2 devices (93% efficiency, 12% sag)
= 28.8 amps per battery
YiHi SX350J devices (93/efficiency, 12% sag)
= 23.04 amps per battery
Seems other than "help my mod isn't firing" the most asked question seems to be "what battery should I use when trying to use X resistence or X wattage on my regulated mod"
There are loads of good reference materials out there which I'll post links for after this initial post (after much research myself)
Note: This post is not intended as "be all and end all" about battery safety so please research other safety aspects seperately (for instance mooch's blog - link posted below), it's about choosing the correct battery and resistence build with an explaination on how each is working on a regulated mod
Note2: I've sourced the information in this thread from multiple sources and stitched it together with working examples in one place for easy reading - I'm not professing to be an authority when it comes to batteries I would refer you to mooch in this regard. I have given credit with associated links to people I sourced material from... a great video with a wide range of material to watch is:
So onto the thread itself ....I thought it would be a good idea to list out the mods or common chips used in mods and the current drain at max settings you'll need to cover. Of course with a caveat that I advise you to double check and carry out your own research
First to dispel some myths though ...regulated mods work on a 2 circuit basis, as such you are interested in the "input" information which believe it or not has nothing to do with the resistence of your coil when trying to determine battery safety. This input circuit is between the battery and the regulator (or chip), rather than "output" circuit between the regulator and the atty (coil) this is in direct contrast to mechanical mods where resistence is of upmost importance as the battery and atty are shared in 1 single circuit.
In terms of battery safety unlike mechanical mods, regulated mods draw more current as the battery voltage decreases to meet the wattage (VW mods) or voltage (VV mods) demands you set on the mod. Once these demands are no longer met the mod will display the low battery message and refuse to fire (in most case where there is low voltage protection built in).... it's this bit we are interested in as the max current drain will be where this happens so in terms of safety you need to be sure you use batteries that can cover this.
There are other things impacting the input information i.e. battery sag, where a batteries internal resistence needs to be taken into consideration I.e a battery at 3.2v might only delivery 2.8v-3v due to this sag (see reference material 8)
Also chip efficiency is important to the input as the chip takes some additional current on top of your setting to power the chip itself i.e a 90% efficiency means it needs an additional 10% power to function
You can calculate this input information yourself It's an extension of Ohms law I = P / V
If you list everything out you need to know:
Mods Max Wattage (A)
No. Batteries in the Mod (B)
Low Voltage Cut off (C)
Sag buffer% (D)
Chip Efficiency% (E)
(N.B some of these we can assume if you're not sure but does means the calculation is more of an approximation so extend some of the figures to more extremes)
Put another way if you want to manually calculate this:
1) Max wattage of mod / no batteries in mod = max wattage per battery
2) low voltage cut off - (sag buffer%) / no of batteries = low voltage per battery
3) max wattage per battery / low voltage per battery /chip efficiency = Current drain
Note: Dividing by the number of batteries ignores whether a mod is wired in series or parralel hence why it's done
For example
1) The Smok HPriv is 220w,
2) uses 2 batteries,
3) has a low voltage cut off of 6.4v
4) but I'll put 5.6v (with an assumed 12% sag buffer),
5) and since I don't know the chip efficiency I'll assume it's 90% to err on the side of caution....So this is
1) 220 / 2 = 110 max wattage per battery
2) 6.4 - (6.4/100*12) /2 = 2.8 low voltage per battery
3) 110 /2.8 / 0.9 = 43.65amps drain per battery
Holy shit 43.65amps per battery! Yep ....now the Smok chip will kick in and limit current draw before this level (bucking and/or boosting) and deliver what it can in pulses but that's a whole load of drain and stress on the chip to cover without the right battery!... problem is you try and find a 18650 with this much CDR! (And is another reason a lot of people say that 220w is a load of bollocks on a dual battery mod... not unless it's in microsecond bursts youre more likely to get something closer to 167w)
All this aside and knowing I don't vape above 110w on my device I can change that 220 to 110 which now gives me 21.82 amps per battery drain much more acceptable right!
Knowing this information allows you to purchase the right battery with the appropriate Continious Discharge Rating (CDR) to cover the amps like the above example. At 110 wattage I might want something like the Sony VTC5A with a CDR of 25, and may even choose this battery when vaping at lower wattages on that mod just in case I push it one day, or to place less stain the mods chip and battery.
It's always better to have additional CDR in reserve where you can and vape within safe wattage limits
Reference material:
1)http://blog.thevaporist.org/2015/12/29/regulated-mods/
2) https://www.e-cigarette-forum.com/f...ngs-picking-a-safe-battery-to-vape-with.7447/
3)https://www.reddit.com/r/electronic...you_dont_calculate_current_draw_on_regulated/
4) https://www.e-cigarette-forum.com/f...attery-current-draw-for-a-regulated-mod.7532/
5) https://www.planetofthevapes.co.uk/...lating-amp-load-using-a-regulated-mod.128294/
6) http://vapingunderground.com/blogs/for-the-new-and-inexperenced-vapor.16/
7)http://vapingunderground.com/threads/anthony-vapes-presents-vaping-safety-101.300140/
8) https://www.e-cigarette-forum.com/forum/blog-entry/what-is-battery-internal-resistance.7569/
Acknowledgements for our members who have helped me form this thread knowledge they have posted/shared with associated links above
@gbalkam
@conanthewarrior
@Mooch
@f1r3b1rd
@SirRichardRear
Mooch also runs a blog with some excellent material including other aspects of battery safety well worth taking the time to read this
https://www.e-cigarette-forum.com/forum/blogs/mooch.256958/
So without further ado (all are 18650 devices at max wattage)
All devices at max settings:
Hohm Wrecker 151w (98.8% efficiency, 12% sag)
=27.29 amps per battery
Hohm Wrecker G2 171w (98.8% efficiency, 12% sag)
=30.91 amps per battery
Hohm Wrecker Slice 101w (assumed 90% efficiency, 12% sag)
=40.08 amps per battery (takes single 26650 battery)
Smok (Assumed chip efficiency at 90% and sag at 12% accross all of the below)
HPriv 220w = 43.6 amps per battery
Alien 220w = 43.6 amps per battery
X cube Ultra 220w = 43.6 amps per battery
X cube 160w = 31.75 amps per battery
DNA 250 devices (97% efficiency, 12% sag)
= 30.68 amps per battery
DNA200 devices (97% efficiency, 12% sag)
= 24.55 amps per battery
DNA167/166 Devices (97% efficiency, 12% sag)
167 = 30.74 amp per battery
166 = 30.56 amps per battery
DNA 75 devices (93% efficiency, 12% sag)
= 28.8 amps per battery
YiHi SX475J devices (92% efficiency, 12% sag)
= 29.11 amps per battery
YiHi SX550J devices (96% efficiency, 12% sag)
= 37.2 amps per battery
YiHi SX450J-BT devices (95% efficiency, 12% sag)
= 37.59amps per battery
YiHi SX350 J-V2 devices (93% efficiency, 12% sag)
= 28.8 amps per battery
YiHi SX350J devices (93/efficiency, 12% sag)
= 23.04 amps per battery
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