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In reading threads on here for the past few months, one common question is always revolving around which is better, single-coils or dual-coils, so I’ve decided to run a little experiment over the past two weeks to determine efficiency, e-juice use, and effect on the battery while using a Kanger ProTank 2 (BCC) and Kanger AeroTank (BDC). I won't bore anyone with the details (unless you want raw data or more info), but I will say I utilized as many control factors as possible (same Air Flow Control base, same settings for battery and base, same e-juice, etc.). Yes, I do this kind of experimentation for fun.... it's the scientist in me While I know that one week of data per tank does not equate to an efficient or definitive scientific study, it does provide statistical data points to assist in making a non-subjective conclusion. Besides, being stuck with one flavor of e-juice and no eGo portability for two weeks was about all I could stand! For those of you interested in specifics or raw-data, just ask... but I wanted to summarize the results to keep this post short enough to read without anyone falling asleep at their keyboard ... Those who want to skip to the Conclusion for the "short-version", feel free to do so.... Observations: AeroTank: Each tank averaged 151.7 “hits” per 2.0 ml of vaping Each day averaged 238.43 “hits” Each day averaged 3.143 ml of e-juice consumed 22 ml of juice was consumed for the week Each “hit” from the AeroTank consumed 0.013 ml of e-juice ProTank 2: Each tank averaged 186.9 “hits” per 2.0 ml of vaping Each day averaged 255.57 “hits” Each day averaged 2.714 ml of e-juice consumed 19 ml of juice was consumed for the week Each “hit” from the ProTank 2 consumed 0.011 ml of e-juice Data Summary / Comparison: E-Juice Use The dual coils consumed 0.013 ml per “hit” and required 22 ml of e-juice per week The single-coils consumed 0.011 ml per “hit” and required 19 ml of e-juice per week Coil Cost Factor (based on same 3-week life-expectancy and $1.50 per BDC, $1 per BCC) The dual-coils cost $0.0300 per 100 “hits” and $0.0714 average per day The single-coils cost $0.0186 per 100 “hits” and $0.0476 average per day E-Juice Cost Factor (based on $14.99 per 30 ml bottle) The dual-coils utilized $1.57 per day and $10.99 per week The single-coils utilized $1.36 per day and $9.49 per week Hits The dual-coils required 35 fewer hits to exhaust a tank The hits per day difference were statistically negligible as the daily average of 238.43 for the dual-coils and 255.57 for the single-coils were within one standard-deviation, thus the daily average (and therefore weekly average) “hits” do not presume an advantage of one coil over the other Statistical Error Correction Error factors of e-juice measurements for the week (0.15 ml or 6% error on refills) +/- 1.50 ml for the dual-coil (based on 10 full refills for the week) +/- 1.35 ml for the single-coil (based on 8.25 refills for the week) Double-hits observed for each week were negligible (< 5) Conclusion: The AeroTank (BDC) clearly consumes more e-juice per “hit”. This is evidenced by the fact that an AeroTank exhausted 2 ml of e-juice an average of 35 “hits” faster than a ProTank 2 (BCC), and the Aerotank consumes a measured volume of 0.002 ml more e-juice per “hit”. The number of “hits” per week between the two coil/tank combinations also gave insight as to battery-life and longevity. Fewer “hits” per tank of e-juice equates to fewer firings of the battery, yet the slight advantage gained by the dual-coils would extend the expected life expectancy of a battery minimally. However, as the experiment showed, daily/weekly “hits” were statistically equal, regardless of tank used, which shows no data-backed evidence to support more volume of vapor to equate to more efficient delivery of nicotine achieved when using a BDC unit. The following are based upon uncorrected data, and assumes 30 ml of e-juice cost @ $14.99 and coil cost assumption of $1 per BCC and $1.50 per BDC. (Yes, your costs/savings may vary). Considering the overall cost factors of coils and e-juice, the dual-coils require an expenditure of roughly $11.50 per week, whereas the single-coils only require an expenditure of roughly $9.85 per week. Clearly the cost factor is leaning towards the cost-savings gained by using the single-coil tank; however, $1.65 per week is hardly what many of us would consider “break-the-bank” savings. After-all, that's roughly the cost of a large cup of coffee from McDonald's or a 20-oz drink from the local convenience store.... So, if you want to conserve a few Milliliters of e-juice per week, and possibly save a few bucks over the course of a year, the ProTank 2 (BCC) is the way to go. But, it should be noted that the AeroTank (BDC) DOES provide (subjectively) a slightly more fulfilling vapor/flavor production over the ProTank 2, and if saving the cost of a decent dinner for two over the course of a year is not your priority… vape-up on the AeroTank!

What you're actually talking about are product codes. Let me copy and paste this from CreigHB (I've quoted this before) It's 4am and easier than typing it all out IMR is a product code. "I" stands for Lithium-Ion, "M" stands for the Manganese based chemistry, and "R" stands for rechargeable. ICR is again a product code. Same as before except "C" stands for the Cobalt based chemistry. Only the round cells commonly use these designators. There are flat cells or prismatic cells that use a Li-Ion chemsitry, but it's usually polymer based (plastic). I've never even seen the code designator for that. Everybody just calls them LiPo cells. High drain means that the cell can handle high output currents. ICR cells are usually limited to 2 times the charge capacity in output drain. So, for example, a 750mAh 14500 ICR cell would be limited to two times 750mA or 1.5A. This is why this type of cell must be protected. It has the lowest drain capability and the highest volatility or flammability in composition. IMR cells typically have an 8C drain limit which is 8 times the charge capacity. A IMR 14500 with 600mAh can handle 4.8A. This chemistry is less volatile than the Cobalt chemistry and has much higher drain limits so they are typically not protected internally. Though, they should have some kind of external protection because they can burn too, just not as easily. LiPo and prsimatic cells can range in drain limit anywhere form 1/2C to 60C. They are slightly less volatile than ICR and a little more than IMR. They are typically not protected internally and should have external protection electronics. These are the type of cells you find in digital cameras and cell phones. Generally speaking, you only use an IMR cell when the device specifically calls for one. IMR cells are required for boosters (single cell VV or VW) because boosters require higher drain. With a booster, you're going from lower voltage to higher voltage. That means you're going from higher current to lower current. IMR cells may also be required for unregulated mods if the cell is small. For example, you are limited to 1.5A with an ICR 14500. If you want to use an LR atty with a cell that size, you need an IMR cell. In the end, the size of your cell boils down to what you want in run time versus size. That's always the big trade-off. If you want a smaller device with a smaller cell, you'll have less run time. If you want more run time, you'll have to tolerate a larger device with a larger cell. Size numbers are based on a metric scale. An 18650 is 18mm x 65.0mm. A 14500 is 14mm x 50.0 mm. A 14500 happens to be the same size as an AA battery.

For those of you not familiar with the term GAS, it does not involve your bowels or automobiles. It stands for Gear Acquiring Syndrome, which is an actual condition. It's very common in the musical instrument industry. Anyway, what are you GASing for? Myself, I really like that Copper Mutant cone but then I saw the King II 26650 mod. This will be ordered in the next 72 hours. I'm still keeping my eyes peeled for a Sir Lancelot and I sort of want a Crown atty.

.08? *sigh* That's way too low. You have a 46amp battery?

I'm always sub-ohming. Most of my builds are in a range from .8 down to .14. My sub .2 builds get hot if you drag them repeatedly and flex the button over and over, as is to be expected, but it gets too warm let alone hot, I put it down. You have to be smart about it. A lot of people (not all mind you) have the common sense when the thing by your face is scorching hot to put it away for a bit. I like clouds, a lot. Its my dumb guilty pleasure. As long as you play it smart and don't chain vape the piss out of a .2 ohm coil, you should be fine.

I'm the epitome of a "look shiny new toy" personality. $5000 in tattoos, 9 mods, 34 guitars and a disgusting amount of video games later. . .

To each their own man. I drip all day long. Don't even own a tank anymore lol.

My next purchase will be an Innokin VTR, but I think that won't be for a while... and I'm actually holding out for an updated design/color option... I think one's coming in the next year (fingers crossed).... I know my limits, and when I have more than I can actually "use", lol... I've been through this syndrome before... with electronics, computers, "gadgets", tools, motorcycles, cars, and the list goes on... but as I've gotten older, I've found there is a saturation point, and I don't feel the need to have "everything" like I did when I was in my 20's. For now, with my vaping gear, as batteries die, I will replace them with better Spinners or similar, and my MVP should be good for a couple of years. I've got more tanks than I can use in a full week of rotation, and enough coils to hold me over until summer or fall of NEXT YEAR I've tried plenty of juices, and have found a few favorites, so I'm not spending time/money GASsing for juice (although I do try something new from time to time as a treat)... For the most-part, I'll just maintain my stockpile so I'll always have at least a month's worth of each of my favorites on the shelf, in case of any hard-times... I try to keep a minimum of 90-120 ml of each of my top-2 flavors, plus 10-30 ml of other favorites on hand at all times. Plus, it doesn't hurt to let them steep on the shelf for a while! Honestly, if I don't buy another thing for the next three months (?), juice included, I can continue vaping without spending a dime! I guess that's the beauty of finding a Zen-point in your hobby?

I have all the vaping gear I want but I am eyeballing a new stereo system for the boat. Bluetooth, 1500w amp, and 12 new speakers. My stereo guy just has to get his heart right and sharpen his pencil a little more. I am patient lol.

I bought a used Russian 91 clone that has the same problem, sucks!

More goodies arrived today! Acrylic light pipes and 534 7amp fuses, which are stupid small!

I never had this issue with my PT2 minis, but I will agree with the suggestion above... verify your coil resistance is not too high. On a non-VV battery, the 1.5 or 1.8 Ohm coils work best @ 3.7V. Going higher (2.2 or 2.5) will greatly reduce the volume of your hit because they will not pull enough Watts.

never had this problem, and i don't know if this is true, but i read that if you screw the mini pro too tightly on the battery, it constricts air flow.

Got in ten 510 atomizers from Brian at The Veteran Vaper yesterday but I was out of town until today. Thanks, Brian!

Yeah it was kind of a joke...not a very good one obviously lol

So what I gathered was it takes more eliquid to produce more vapor.Who would have thought.

300 510 connections with floating center pins! These are solidly made and just sopha king awesome.

This was my first shot at the "wickless coil" that Proetus shared with us. After watching the video I became more than curious to see how it would work when I tried it for myself. As with all my builds, this is all 28g kanthal. This thing was a P.I.T.A. to build. It's not all even, there are some loose wraps in the kanthal around the outside, but it vapes pretty good. Like the guy who filmed the video tells us, it's not an all day coil. But the flavor out of this thing is absolutely amazing. I am shocked. It changes the taste of my juices completely. I will NOT be giving this one another try because of how difficult it was to put together, but I am pleased with the results.

And use a Joye or other name brand charger (unless you are Bebop lol)

That's awesome. Make sure not to over discharge the battery. That is the quickest way to kill one. It wouldn't hurt to check them on a multi meter, you shouldn't go under like 3.2 or 3.3.

Like i said...this doesn't taste like an American Cig. It tastes like a Bali shag rolled cigarette...something with good tobacco. If you like tobacco juices this is amazing. Also Mega that is kind of the taste. This is the most authentic tobacco flavored juice i have ever tried. Just trust me lol...its good. sent from my Ice Cream Sandwiched Gtablet