A Product That May Rewrite the History of Bottom-Fill Devices: Xixile Bottom-Fill Atomizer Review

Since 2017, bottom-fill devices have gradually gained popularity in the domestic e-cigarette community, with prices soaring. For example, a 157W non-bottom-fill box mod with adjustable wattage and temperature control, along with various protections against short circuits and reverse polarity, sells for around 200 yuan. A single battery (maximum 80W) bottom-fill box mod, which is a mechanical device without chips or protections, is mostly priced above 200 yuan online, except for a few brands like Rabbit.

Noticing this trend, I started paying attention to buying dripping atomizers that come with bottom-fill screws, intentionally leaving room for expansion, hoping that my atomizers could serve multiple purposes and indirectly "appreciate" in value. I even recommended to beginners that they should buy atomizers with bottom-fill screws. Looking back now, I truly thank myself!

"Fountain" box mod
I also got a bottom-fill box mod called "Fountain," which allows you to "pump" oil into the atomizer using a handle. It felt incredibly impressive, and seeing others with squeeze bottles made me feel superior. Later, I saw a brand release an automatic oil-sucking bottom-fill box mod, which I thought was amazing! This is the direction we need! I commented at the time that "this technology can definitely be applied to RDTA with a Genesis structure," and lo and behold, just a few days ago, I discovered this product:

Image 1: Opening the package of the oil-sucking device

Image 2: Contents of the oil-sucking device package
The packaging is printed with: juice tank adapter for atomizer. This roughly translates to "oil tank adapter for atomizers." It consists of a small oil tank and a small oil bottle, with the metal part made of 304 stainless steel and the transparent chamber made of glass. It serves as a glass oil reservoir for the bottom-fill atomizer, relying on the suction created when vaping to draw oil into the atomizer.

Image 3: Oil-sucking device
I don’t have a caliper here, but the manual states that the height (excluding the positive screw) is about 20.8mm, and the diameter is 24mm, which perfectly matches 24mm atomizers (my 528, Mage, Mesh, and Rabid are all 24mm).

Image 4: Oil-sucking device manual

Image 5: Disassembly diagram of the oil-sucking device
1. Oil delivery capability test:

Image 6: 528 atomizer
The 528 atomizer used for the oil delivery capability test employs a dual coil Ni80 Clapton and 28ga Ni80 wire, with a dual resistance of 0.13 ohms. I used a second-generation box mod, setting the power to 100W (any higher felt too hot for the vapor).

Image 7: Box mod settings

Image 8: Coil and cotton
VG:PG ratio of 50:50 e-liquid (this is definitely the ratio I used, as I mixed my own chilled Tieguanyin e-liquid), with the airflow holes opened to normal size. After blocking the airflow holes and taking four puffs (cheeks puffed out), the cotton was fully saturated with e-liquid, ready for ignition and heating. I took 31 continuous puffs (with the longest pause being 3 seconds), and the oil delivery was flawless, with no burnt cotton taste. It was refreshing; I had only used the mouth-to-lung atomizer for several days, and switching to this was a delight! High power burst, dripping large vapor, fresh taste, and no need to constantly drip oil—what a joy!

Image 9: After taking 31 puffs
High VG e-liquid (marketed as 80:20; due to strong throat hit, I added about 1/3 more VG, making the actual ratio at least 90:10). After blocking the airflow holes and taking four puffs, it was ready for ignition and heating. I took 10 continuous puffs without any burnt taste, but the cotton on one side had turned white. After blocking the airflow holes and taking two puffs, the cotton was saturated.
70:30 e-liquid worked fine even after taking several puffs. I feel that high VG e-liquid requires careful monitoring.
2. Leakage test
After naturally taking several puffs, I laid the oil-sucking device flat with half a tank of oil for 4 minutes and observed that there was no leakage from the box mod, oil-sucking device, or atomizer. The napkin under the atomizer showed no oil stains.

Image 10: Leakage test
? ? 3. Ease of refilling
? ? Unscrewing the atomizer and lifting the lid of the oil-sucking device allows for refilling, which is slightly more complex than the "Fountain" but much more convenient than squeeze bottles. However, this device has two small plastic plugs; if you don’t remove them, it’s best to use a syringe bottle for refilling. Removing one (which is quite easy) allows for using a regular refill bottle without any issues.
? ? 4. Other features:
? ? The workmanship is decent, with no obvious defects. The cloud pattern decoration has a Chinese style, and it is easy to disassemble and clean, allowing almost all e-liquid to be delivered to the atomizer, leaving minimal residual e-liquid in the oil-sucking device.

Image 11: Oil-sucking device paired with Hadaly

Image 12: Oil-sucking device paired with mesh atomizer
? ?
Summary:

Advantages:
1. Versatile. It can be paired with any box mod or rod and can work with any bottom-fill atomizer, with 24mm being the most aesthetically pleasing.

2. Aesthetic. Compared to accessories that come with a bottle next to the rod, this device is unmatched in appearance and is even cheaper! It can directly replace those accessories.

3. Convenient and reliable. Testing showed smooth oil delivery with no issues, and it is easy to disassemble and clean.

4. Affordable, priced similarly to a regular high-quality dripping atomizer.

Disadvantages:

1. Small oil capacity. 4ml is less than most bottom-fill box mods, and future versions could offer larger tanks.

2. Single diameter. Currently, it only comes in 24mm, which pairs best with 24mm atomizers. It would be advisable to release versions in 22mm, 25mm, etc.

3. High VG e-liquids require careful monitoring to prevent dry hits due to delayed oil delivery.

The emergence of this small accessory has given all box mods and rods the ability to bottom-fill, revitalizing them. Since acquiring this, my desire to purchase new bottom-fill box mods has diminished, as all my existing devices can now utilize bottom-fill functionality without urgency to buy new ones!

I believe that as the oil-sucking device continues to improve, bottom-fill devices will gradually move towards automatic oil-sucking. In the future, most dripping atomizers will likely come standard with bottom-fill positive screws, and the prices of bottom-fill devices will decrease while their functionalities will enhance (otherwise, they will lose to regular box mods paired with oil-sucking devices). Some oil storage atomizers may also adopt this automatic oil-sucking method for refilling.

???? The oil-sucking device may change the history of bottom-fill devices.