Differences between Uni coils and Unipro coils.
Here is a comparison picture.（Notice: The airflow ring for Uni coils and Unipro coils are different too.）

Get your RTA/RBA/RDTA wicking right.
1. Keep the cotton FLUFFY.
One of the most important things to keep in mind is that densely-packed cotton won't soak e-juice up as effectively as a more loosely-packed wick.
2. Don't use too much cotton and think about your PG/VG ratio.
If you use too much cotton for your wick, it’s much harder to ensure it doesn’t end up too dense to wick effectively.Try to thin the cotton on the two sides a little more with scissors.
The amount of cotton you need to use is closely-related to the PG/VG ratio of the juice you'll be vaping. For higher-VG mixes, less cotton is better. This is because VG is thicker than PG, and so needs more“space in your wick to soak up into – a little bit like how you might be able to drink coke through a straw easily but would struggle to enjoy a thick milkshake through it.
If you have a higher-PG blend (like Black Note's 50/50 mixes), then you can afford to have a little bit more cotton packed a little more densely. You still should be able to insert the finished wick into the coil without misshaping it, but you don’t have to be as strict about the amounts.
3. Cut the wicks down.The easiest advice is to give your wick a “bowl cut”around the edges of the deck.
4. Keep the cotton away from juice channel and air hole.Use a small tool (a precision screwdriver, pair of tweezers or anything else small and thin) you can nudge and position your wick to ensure it stays clear of the under-coil airflow hole.
5. Prime the wicks before refilling and vaping.Take a second and give your wicks a liberal soaking in e-juice prior to filling your tanks and you won’t get a dry hit as soon as you start vaping and ruin your hard work.

Как часто нужно менять катушки.
Как правило, катушка, используемая в пределах своего рабочего диапазона и в постоянном темпе, прослужит примерно две недели. Однако это не гарантия, катушки могут сгореть гораздо быстрее.
1. Если вы сильно парите на высокой мощности, ваши катушки могут не прослужить так долго.
2. Если вы используете катушки выше максимальной мощности, указанной на катушке, хлопок (или впитывающий материал) в катушке сгорит почти мгновенно.
3. После того, как змеевик подгорел, он необратимо поврежден и будет иметь неприятный горелый вкус. Сгоревшие змеевики также могут привести к утечке жидкости из резервуара через отверстия для потока воздуха.
4. Качество вашей электронной жидкости также может повлиять на срок службы вашей катушки. Например, известно, что некоторые вкусы сливок более требовательны к вашим спиралькам.
Важно помнить, что пользователь контролирует то, как используется катушка. Если мы сосредоточены на том, чтобы ваши катушки прослужили дольше, важно убедиться, что вы знаете о факторах, которые повлияют на срок службы вашей катушки.

Когда я узнаю, что пора менять катушку?
Это будет очень очевидно. Вы заметите уменьшение вкуса, меньшее количество паров, горелый или неприятный вкус, и ваш бак может протекать больше, чем обычно.

How to extend the coil life.
Before using a new coil for the first time, it is important to prime your coil directly with e-liquid to ensure the cotton (or wicking material) does not burn. New coils are dry and any dry portions of a coil will burn when heated, so it is very important to ensure coils are adequately saturated with e-liquid prior to firing them in your tank.It is best to prime (wick) your new coil before installing it.



1.Simply hold the coil with one hand and then with the other take your e-liquid bottle and carefully squirt drops of e-liquid directly onto the cotton (or wicking material) on the inside of the coil.
2. As well as applying e-liquid to the inside of the coil, it is also recommended to squirt a few drop on the actual wicking holes on the side of the coil, to ensure a really good saturation. Usually about 5 or 6 drops on the inside and a couple of drops on each of the side wick holes will be enough.
3. Let the coils sit in a full tank of e-liquid for up to 5-10 minutes prior to use to ensure that the coil is saturated.
4. One the coil is primed (wicked) and installed into the tank, it is important to not to turn your mod up to high initially. Simply set your mod somewhere below the minimum of the range specified on the coil and give it a few draws at a lower wattage to ensure the coil is not burning.
5. During this initial process for getting a new coil going, you can also blow into your tank while firing it (reverse vaping) rather than sucking to avoid spit-back which may occur as a result of over priming (wicking). This process will evaporate away any excess e-liquid on the coil and get the coil into a more consistent state of saturation.

An OXVA fan's sharing on extending the coil life:
1. Daily Wattage set at max. 25w (Recommend at 20w)
2. Regular suctioning duration: ≤ 2 s (this is the one that really affects the speed of the burning coil)
3. Ideally (though personally) apply cold fruity liquid freebase / salt-nic.
4. Stock many coils as you can , mine is 0.3 coil.
5. BTW, personal experience is that 1 coil last 10 to 14 days with cold fruity liquid.

Origin X RDTA Coil Building.



Recommended Coils
For Dual coil:Fused Clapton：Ni80 3x28ga/38ga 6wrap ID3mm dual coil 0.22Ω
For single coil：2 core/ 3 core Fused clapton or Alien Fused Clapton 0.25-0.35Ω
Alien Clapton Coil：KA1 3x28ga/30ga 5wrap ID3mm single coil 0.32Ω
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