Archive for the ‘Rebuildable Atomizers’ Category

According to the Slim Vape Pen blog, “a bottom coil clearomizer, also known as a bottom feed clearomizer, or bottom feeders, is a clearomizer that has the atomizer (heating coil) at the bottom of the tank.

Meanwhile, Quit Smoking Community has published a guide into clearomizers, cartomizers and atomizers that described a bottom coil type as “a clearomizer with a bottom coil, has great wicking, and the vapor quality is excellent. And it produces a very cool vapor, which is great if that is what you prefer. You won’t have to worry about the vapor burning your throat.

If you’re like most vapers, you’d have bought personal vaporizers equipped with either a top coil or bottom coil atomizers. The choice on whether a bottom coil tank atomizer is a better option than a top coil depends on your needs at the moment. Refer to this bulleted comparison between top coil and bottom coil atomizers for an overview:

Top Coil vs Bottom Coil Clearomizers

If you’re looking for a good bottom coil clearomizer to start vaping with, then choose a Mini Kanger Protank 2 or a Kanger EVOD for starters. When you hit a snag with a Kanger, try some other brand until you found one that gives you a smooth vaping experience. Here are some suggestions from the Vapor Jedi gallery.

eleaf bcc gt ego clearomizer black

Eleaf BCC GT Ego Clearomizer (Black) via VaporJedi

Eleaf BCC-GT Bottom Coil Glass Clearomizer with 1.6 ml Tank

This stainless steel clearomizer has a newly designed dual bottom coil. The Pyrex glass tank ensures clean flavor and eliminates the risk of plastic leeching into your liquid. The new dual coil head provides incredible vapor production and flavor. The tip of the Eleaf BCC-GT is removable and can be replaced with most 510 trip tips.

It’s available in seven colors. The BCC-GT mouthpiece is pluggable.

The BDC atomizer head offers two values of coil resistance: acquiescent 1.8 ohm and alternative 1.6 ohm. Because of this, it’s expected that the BCC-GT atomizer will vaporize more thoroughly compared to other types of atomizers. Other features include:

* eGo threading connection
* Removable 510 drip tip
* Bottom filling and heating

Aspire Nautilus Mini 2 BVC tank

Aspire Nautilus Mini 2 with BVC tank via VaporJedi

Nautilus Mini BVC Clearomizer by Aspire

The Nautilus Mini is made of stainless steel and Pyrex glass, and it uses the Aspire BVC (Bottom Vertical Coil) atomizer technology. It’s designed to last longer and provide the purest and cleanest taste from e-liquids. Its main feature is an improved four-port adjustable airflow system, which allows the user to adjust the draw, warmth of vapor, and amount of vapor produced. Other features of this clearomizer include:

* one 2ml Nautilus Mini Tank (1.8 ohm BVC atomizer pre-installed)
* one replacement BVC atomizer (1.8 ohm)
* an eGo threaded cone
* a user manual

How to Take Care of Your Bottom Coil Atomizer

In general, a coil head or clearomizer may last anywhere from 3 to 14 days. You may extend the life of your clearo when you know how to keep your hardware in tip-top condition. According to this Reddit post, fruity e-juice flavors leave behind residue on the coils more than any other type of nicotine-containing liquid. The person who posted that message also provided a few insights into using bottom coil clearomizers:

1. Fruity flavors usually gunk them up pretty quickly. I can go for a week or so with a pure (as in simple) tobacco juice and no funky taste, no taste changes, nothing. If I use anything sweet, I need to clean it up after about 10 ml (~4 refills).

2. If the liquid goes below 1.3-1.5 ml, it will gurgle. And not the mild type of gurgle that goes away if you do 3, the one that goes away only if you fill it up again.

3. If it gurgles after a refill or because of condensation (vaping in cold weather, bringing it back in the house, etc..) DO NOT remove the clearomizer and blow through the tip! This will totally mess it up and you will need to take it apart and clean it. What you need to do is either (a)blow through the bottom or (b)(preferably) take a couple of short drags without activating the battery. This will take care of it.

4. I usually vape them at around 3.7-4.2 volts. If it starts to taste funky, I found that a temporary solution (if you’re at work or something and you don’t have a spare or can’t clean it) is to dial up to a higher voltage (in my case 4.8 – twist) and do a couple of long drags without inhaling it. This kinda clears up the gunk for about two-three hours.

5. If it starts to consistently taste bad/burnt, changing coils doesn’t do much unless you clean the whole clearomizer and discard the juice.

6. Cleaning them with isopropyl alcohol works really really well. I have one (I call it The Invincible) that I’ve been using for a month now (same body, same coil) and was cleaned three times, changed juices at every cleansing, with blackberry then RY4 then banana nut bread. Still going strong.

7. If you leave them filled on the desk for a couple of days, they will gurgle. Applying 3.(b) solves it.

8. Another thing about condensation. If you want to fill it and tip it over, use a napkin at the drip tip otherwise you’ll have a surprise juice discharge in your hands.

It’s not just leftover gunk that may cause you to draw dry hits from a bottom coil atomizer. It may be the thickness of your juice, wick size and vaping voltage, among others. The PUCK E-cig Mods blog has identified the issue:

As you draw on the mouth piece of a bottom coil atomizer (BCC for short), you are sucking out the juice from the tank basically into the atomizer wick holes. As you deplete the juice in the tank, you are creating a vacuum above the liquid. The more liquid you use up, the more vacuum you create in the tank above the juice. This vacuum wants to keep the juice in the tank and not let it go out through the atomizer wick holes. What happens next, a dry drag into your throat.

That’s the reason why many bottom coil clearos have multi-port airflow systems. A few vapers have suggested drilling into the microscopic holes to widen them, but this can cause juice to leak out if you’re not careful with your modifications.

Stainless Steel Royale Drip Tip by 2Puffs

The high-end Royale Drip Tip by 2 Puffs is made of 304 stainless steel. It has a 510 connector on its bottom. Image via Vapor Jedi.

A drip tip is more than a mouthpiece for your atomizer. Vapers who are old enough to remember second-generation e-cigs will tell you a drip tip is an ingenuous invention. It cuts the time you spend dripping nicotine juice into your RDA because you don’t need to remove the head to insert the dropper into atomizer and coat the coil with your favorite e-liquid.

Drip tips are made of different materials, such as thermal-resistant plastic, hand blown glass, ceramic and stainless steel. Vapers say the material and length of the drip tip will affect the flavor and temperature of each drag.

You will get a different flavour with different tips, Factors affecting flavour include: Tip material, bore size, bore shape, inlet hole size, outlet hole size, tip length, tip weight, tip surface area. Not a comprehensive list but almost all of them seem to affect flavour.

Some people say ceramic and stainless steel drip tips provide the best flavor while others say Pyrex glass is simply the best because it’s “almost entirely chemically neutral in a vaping environment.

Royal Goblet Drip Tip by Vape Smith Philippines

The Royal Goblet Drip Tip by Vape Smith Philippines is a wide-bore type made of stainless steel. It’s made for Castle RDAs and other systems that use 510 connectors. Image via Vapor Jedi.

One of the threads at The Vapers Shed forum mentioned the following materials as neutral tasting: stainless steel (particularly 316 and 304), titanium (surgical grade), brass (naval or marine grade), stone, ceramic, and glass (either Pyrex or Borsilicate). If it’s made of glass, the drip tip must be all glass because the flavor may not be neutral if it’s on an aluminium holder, for example.

Materials that may affect the flavor of the e-juice to some extent include: aluminium, thermoplastic known as Acetal Homopolymer or by its popular trade name of Delrin, acrylic, several types of wood, and rubber. In some cases, drip tips with Teflon coating end up producing metallic tasting vapes.

The following text from a Vape Ranks article describes the drip tip best:

Also known as a mouth piece, the drip tip comes in various shapes and sizes, and can be made out of different materials, like stainless steel, aluminum, plastic or ceramic. The material from which a drip tip is manufactured as well as its length greatly influences the temperature of the vapor produced by an electronic cigarette. Steel drip tips, for example, cool off the vapor as it passes through it, but long plastic drip tips are also known to deliver cooler vapor, because of the distance it travels to reach the mouth.

Drip tips are best used on rebuildable atomizers. E-cigarettes like the Evod have drip tips, but they’re not replaceable. Some drip tips are short while others are long. You preference on the temperature of your vapes will determine whether a short drip tip is perfect for you or not.

Well, what can I say? At least, the FDA is considerate enough to post an advance notice of proposed rule-making (ANPRM) to let everyone concerned know that they’re going to make it harder and more expensive for e-juice vendors and manufacturers to sell their products.

Wow… Thank you so much, FDA!

But, let’s face it. The Food and Drug Administration is going to regulate vaping, sooner or later. Pretty soon, the government will be limiting the nicotine concentrations of commercially available e-liquids to make them non-toxic to men, women and children, and even household pets.


Child-Resistant Deep Skirt Closure or Cap for an E-liquid Bottle

Child-Resistant Closures for E-Liquid Bottles

As a preemptive measure, manufacturers have started using child-resistant caps and bottles for their nicotine-containing e-liquids. They seal-in the flavored e-juice into 10ml, 15ml and 30ml bottles that have water-tight and air-tight closures to keep in the liquid’s freshness and flavor.

According to one manufacturer’s website, there are four types of reclosable child-resistant closures for e-liquid bottles. Reclosable closures are “capable of being reclosed with a similar degree of security after they were initially opened and are capable of being used a sufficient number of times to dispense the total contents without loss of security.”

A push-down-and-turn cap is a most effective type of child-resistant packaging because “children at the relevant age of 42 to 51 months are not fully capable of performing two movements – push and turn – at the same time and in a coordinated manner.”

When using reclosable packaging, make sure you have “adequate directions for both opening and closing it. These instructions may appear in the form of words or graphics on the package itself, or be conspicuously placed elsewhere on the label.”

child resistant caps for e-liquid bottles

Child-resistant caps with droppers and closure tips for e-liquid bottles.

A CT or continuous thread closure, on one hand, features a cap with a built-in dropper that has a typical 15-mm closure tip. Other CT closures have longer and narrower tips. These caps are commonly used in refilling tanks and drips. Meanwhile, deep skirt closures are taller than average because they’re designed to cover a longer, wider or taller sealing surface.

In comparison, the strap cap or hinged closure has a long, thin plastic cord that connects the top-half of the cap to the bottom-half portion at all times. Sometimes, this type of closure would leave the lower portion stuck to the bottle’s sealing surface while its strap cap hung from the neck. In other cases, a hinged closure would have a whole cap hanging from its plastic cord, which was kept in place by a small plastic hoop wrapped tightly around the bottle’s neck.

Specific Information to Print on Warning Labels

The kind of information that a federal agency would want to see printed on the label of an e-liquid bottle is probably similar to those listed by the Electronic Cigarette Industry Trade Association (ECITA) on their website.

The ECITA has one caveat, however. E-liquids that have a nicotine concentration of between 0% and 2.49% each – irrespective of how they were sold or purchased – must display the following information on their labels.

  • Heading: “CAUTION:”
  • Text #1: “Keep out of the reach of children and pets.”
  • Text #2: “Only for use in/with [delete as appropriate] electronic cigarettes.”
  • Text #3: “Seek medical advice if you feel unwell.”
  • Text #4: “May contain traces of [allergen].”
  • Nicotine concentration in weight per volume (w/v) percentage and/or milligrams per milliliter (mg/ml) must be displayed on the label.
  • The batch number must be displayed.
  • The ‘Best Before End’ date must be displayed.
  • Contact details must be displayed.

The FDA wanted a nicotine-exposure warning plastered on every e-juice bottle. A simple warning may be worded this way:

WARNING: This product contains nicotine extracted from tobacco. Nicotine is an addictive chemical. Possible side effects from continued use of this product include dizziness, nausea, sore throat, and dry mouth. DO NOT INGEST. Keep out of reach of children.

Or… You can put warning labels on your products with a detailed picture of what to expect from e-liquids that have too much nicotine in them, which is exactly what this chart from ECITA shows.

Image via

How E-Liquids are Classified and Labeled in the U.K.

The Classification, Labelling and Packaging (CLP) Regulations of ECITA has a classification chart of e-liquids that included specific markings and warnings for each category. E-liquids are classified into four categories based on their nicotine level. Each group has a list of possible hazards and a corresponding list of precautionary measures.

The chart classifies e-liquids with a nicotine level of 2.5% and over as toxic, especially when the juice comes in contact with skin or when it’s swallowed. Meanwhile, e-liquids with a nicotine concentration of 25% to 100% can be fatal to aquatic life and to humans, as well.

Not for Sale to Minors

I’m sure the FDA would want e-juice makers to include a short note to all underage vapers: Not for Sale to Minors. Along the road, you’ll probably see a similar note on an APV packaging that says: “Not designed or intended primarily for use by minors 18 years of age or younger.”

Although everyone knows that an electronic cigarette is NOT a children’s product, clearly labeling a personal vaporizer as “for adult use” only puts it in the same category as a sex toy. Considering that current public policies on vaping have turned this fun and relaxing activity into something dirty and unhealthy when it’s done in public, it’s the perfect analogy.


Kayfun Lite Plus by Svoe Mesto (Photo via

A rebuildable atomizer or RBA is designed to work like a charm even after its components have been dismantled carefully, replaced or modified according to a vaper’s specifications, and put back together correctly.

This customizable atty (vape slang for atomizer) is a favorite among sub-ohm vaping fans. It gives them the creative freedom to build a custom coil-and-wick structure that not only looks beautiful in form, but also works really, really well in producing clouds of vapor.

An RBA may be classified into one of three types: RDA, RTA and GRA. These atomizers have different advantages and disadvantages they can offer to vapers.

RDA – Rebuildable Dripping Atomizers

The drip-type atomizer or RDA is the simplest among the three. It doesn’t have a built-in (either semi-sealed or sealed) juice container or tank. You build your own coil(s) and wick(s) using a variety of materials, drip e-juice from the bottle onto the wick, and vape away. When the draws start to taste a bit dry and less flavorful, it’s time to drip in more juice.

PROS: These atomizers are typified by a short, 510 base that has sufficient space to hold a coil or coils. Liquid nicotine flows from a small juice well on its tip and into the wick via a drip tip. They are frequently used for sub-ohm vaping. They often produce the most flavorful vapes.

Practically, any type of coil is compatible with RDAs. The shape, quantity and resistance values of the coils are limited only by the number of terminal posts you put in and the size of the atomizer’s build deck. A wide variety of fibrous materials from all-natural cotton balls to ceramic rods or ropes can be used for the wick.

CONS: Many RDAs don’t have a juice container. Even those atomizers with the deepest juice wells can only hold 30 or so drops of e-juice at a time. And so, e-juice from the oversaturated wick has a tendency to leak. This will require you to have an extra e-juice bottle at your disposal.

Great examples are Nimbus, Origen, Magma, Veritas, Tugboat, Plume Veil, 454 and Vulcan. Many RDAs have a “deep juice well” in the drip tip and feature both vertical and horizontal coil designs.

RTA – Rebuildable Tank Atomizers

All RTAs operate on the principle of “pressure differential“. In short, the positive pressure in the air venting system and the negative pressure in the liquid tank are kept separate, yet balanced.

PROS: The e-juice is carefully fed to the wick in appropriate quantities until the fibrous material is saturated with liquid. As the wick expands inside the atomizer, it expands and pushes against the mouth of the tank atomizer, and the orifice shrinks in size. The layer between the two opposing pressures acts a sealant that prevents excess e-juice from flowing into the drip tip.

CONS: The coils and wicks in RTAs aren’t as easy to replace or modify as those used in dripping atomizers.

Best examples are the SvoeMesto Kayfun3.1/KFL+ and Kebo Russian/R91%. These two have held the top spots in both genuine and clone RTA popularity, with the Taifun GT, sQuape and Fogger V4 and Flash-E Vapor in hot pursuit. New RTAs come out from all around the world every few weeks. The Gus Estia and Inverno Erlkönigin are currently only available in genuine form, but they will become very popular once cloned.

Genesis Rebuildable Atomizers

These RBAs depend on the power of osmosis to pull juice up from its bottom tank. One end of the wick is submerged in the juice inside the tank. Strong capillary action pushes the juice upwards as the wick’s absorbent material becomes saturated with liquid from the bottom up.

genesis style tank atomizer

UD AGA-T4 Genesis RBA is a dual-coil genesis-style rebuildable tank atomizer. (Photo via

PROS: These atomizers generally use wicks made from ultra-absorbent materials, such as a stainless steel mesh, a natural fiber rope, and porous ceramic rods. They provide adequate, but not excessive, capillary action.

CONS: The juice tank is not sealed or regulated in any way. So, when the atomizer is tipped to the side or turned over upside-down, some of the juice might leak into the e-cig and wreak havoc on its circuitry, or it could come out of the wick hole or tank vent port. Also, you may need to “tip” the atomizer to get juice up to the portion of the wick that’s wrapped by the coil.

Examples of modern genesis-type atomizers are the Smoketech Dual Coil Pyrex RSST, the Mirandus Genesis RBA by Circle of Mod, and the UD AGA-T4 Genesis RBA, which is a dual-coil genesis-style rebuildable tank.