Cthulhu AIO Review: The Compact RBA Box for MTL Vaping


by Vaping Daily Team

Updated: May 2, 2023

cthulhu aio review

Review Score: 91/100

Price Range:
$94.99 - $101.97
Battery Type:
Wattage Range:
5W - 60W
E-liquid Capacity:
Works with:
  • Eliquids icon


  • Compact design
  • Can be recharged quickly
  • Lightweight material


  • The design may fail to thrill all vapers

Starting Price: $ 94.99

The Cthulhu AIO box mod is popular because of its unique name. Yes, spelling or pronouncing is hard, but this product is built for a smooth experience.

The Cthulhu RBA AIO is a 6ml vape powered by a 60W chip. It comes with a Boro tank and is compatible with Aspire Nautilus coils. This high-quality product does well in many categories. It’ll make a handy device for experienced vapers. Keep reading to learn interesting details about this vape.

What Is Cthulhu AIO Box?

cthulhu aio review

The Delrin Cthulhu RBA AIO is made from high-quality Aviation Grade Aluminum. A powerful 60W Chip powers the device. This is one of the most efficient chips on the market. It maximizes the battery life of the mod. It’s the smallest Boro device on the market and is suitable for everyday use.

This device is lightweight and small enough to fit in most pockets. You can carry it around with you without the pressure of additional luggage. The battery and chipset of this box are on the opposite side of the tank. This will protect the device from e-liquid ingress.

The Cthulhu RBA is different from one-time vape devices. It has a refillable e-liquid tank. The boro tank allows you easily see how much juice you have left. This device is compatible with Boro tanks used in Billet boxes. The vape has airflow holes on its side.

Vapor Production

Vapor production on this device is quite simple. Because of its MTL design, the hit is delivered directly into your lungs. However, you’ll not feel any dryness in your chest. The device is powered by a fire button. When you hit the power button, the coil will heat up.

You can turn on and off the light on the firing button. The amount of vapor the device will produce depends on the airflow pin that you choose. There are four different variants to choose:

  • 0.8mm
  • 1,2mm
  • 1.6mm
  • 2mm

Power Mods

cthulhu rba aio kit review

One of the major selling points of the New Cthulhu AIO is its high efficiency chip. This chip will allow you optimize your battery life. Users can vary the output of the device between 5 – 60W (1-8V). Available user power mods are:

  • Bypass
  • Variable Voltage
  • Variable Wattage
  • TCR
  • Temperature Control

Protection Features

The ultimate protection of this device is its durable body. The aluminium alloy will maintain its shape even when dropped. The Boro tanks are also tough. Furthermore, the battery and chipset are kept away from the vape tank to avoid any liquid ingress.

Cthulhu RBA AIO Starter Kit

If you buy Cthulhu AIO kit, you’ll find the following items in it:

  • The Cthulhu AIO Delrin Version
  • Cthulhu RBA tank
  • USB-C charging cable
  • Spares bag
  • 510 deck thread adaptor
  • Drip Tip
  • Nautilus coil adaptor bridge
  • User manual

Internal Building Quality and Design

This 6ml device is designed with a Boro tank. This is a refillable tank made from Borosilicate Glass. You can see through these tanks and review their content. Inside the Boro tank, you’ll find a bridge — a coil holder.

This MTL (Mouth to Lung) uses a single coil deck. You can detach the airflow pin and replace it with 0.8mm, 1,2mm, 1.6mm, and 2mm.

The body of the Cthulhu AIO box mod is available in 4 colors: Pacific Blue, Midnight Green, Elegant Black, and Hot Pink.


cthulhu aio battery

This best Cthulhu AIO mod box is powered by a 18560 battery. This is not the most powerful battery out there. But it will give you a considerable time to enjoy a lengthy vape session. Vapers can recharge their battery with a USB Type C cable. As a result, you can expect the battery to charge quickly.

Battery Levels Indicators

This device has an in-built 0.49-inch screen on one of its side panels. Here, you’ll find an indicator of the battery levels and how muhc power you’re currently using. You can turn on and off the light of the OLED screen. There are adjustment buttons (+/-) below the screen. There’s a color LED ring on the device’s fire button. This ring is an indicator of the current battery level.

RBA Tank

The Cthulhu RBA tank is a refillable chamber with a borosilicate glass panel. This glass panel will allow you slide off the tank with ease. Boro tanks have an in-built bridge that serves as a coil holder. These bridges can use stock coils from several manufacturers.

The Cthluhu box features a Genesis Style Atomizer that feeds the juice directly down to the coil. The vape device doesn’t leave you stuck with the RBA tank.

Juices Compatible

This vape device is compatible with different types of VG/PG vape juice. It’s also easy to refill your tanks from a port in ints front. Therefore, you don’t need to remove it when your e-juice is depleted.

Cthulhu AIO Coils

The Boro tanks feature bridges with stock coils. The device can use coils from these vapes: Smok Nord, Vaporesso EUC, and Aspire Nautilus.


This vape enjoys reasonable ventilation with the airflow holes on the side. You can alternate how much vapor you want to drag in with each hit. There are alternative airflow pins to use; ranging from 0.8mm – 2mm.

How to Use Cthulhu AIO

There’s no learning curve on how to use the Cthulhu. Press the fire button to switch on this MTL device, and drag the vapor with your mouth.

Step-by-step Guide Instructions

  1. Press the fire button to start vaping
  2. You can use the adjustment buttons (+/-) to make changes to how your vape device works. Vapers can change the power output of their device.
  3. Vapers can slide the boro tank off the borosilcate panels. But you can refill the device directly through a port at the front.

How to Charge

There’s a USB Type C cable in the mod kit.

  • Connect this cable to a compatible charger and plug it into your device.
  • The device will start charging immediately.
  • The battery level is indicated on the firing button and OLED screen.


Cthulhu AIO vs. Vandy Vape PULSE AIO

vandy vape pulse aio 80w review

The Vape PULSE AIO is an inexpensive plastic squonk mod. This device features a boro tank with a stock coil. There’s a rebuildable boro tank included in this kit. It runs on a 21700 battery, and has two power modes.

Cthulhu AIO vs. Dot AIO

The Dot AIO is a great alternative to the billet box. Like other AIOs, it has a boro tank with a coil in its bridge.


  • Is Cthulhu AIO good?

    The Cthulhu AIO is a 6ml device that allows vapers alternate the power output. Its performance is reliable making it an ideal choice for most experienced vapers.

  • Do billet box buttons fit Cthulhu?

    The Cthulhu features boro tanks similar to those found on billet boxes.

  • Which Nautilus coils for Cthulhu AIO tank?

    The boro tanks on the Cthulhu device is renowned for its versatility. It’s compatible with the Aspire Nautilus coils.

Cthulhu AIO Specifications

Dimensions: 80 x 48.2 x 22.8mm
Battery Type: 1×18650
Output: 5W - 60W (1V - 8V)
E-liquid Capacity: 6mL
Display: 0.49-inch OLED scree
Resistance Range: 0.1ohm - 3ohm
Temperature Range: 200°F - 600°F
Compatible with Boro tanks :
4 airflow pins: 0.8mm, 1,2mm, 1.6mm, and 2mm
Body Material: Aviation aluminium alloy
USB Type C Charging: 0.7A Charge rate


The Positives

  • Compact design
  • Lightweight material
  • Can be recharged quickly
  • Several airflow pins allow capers to decide on their preferred drag

The Negatives

  • The design may fail to thrill all vapers


And that’s all on the Cthulhu AIO review. From all indications, this vape device is designed for high-quality performance. It’s a 6ml device with an efficient 60W chip. You’ll enjoy satisfactory vape sessions with this kit. It’s safe to say that this device is built for experienced vapers who know their way around complex setting.

The standout feature of this vape are the boro tanks and 91% efficiency chip. We’ll recommend this device for vapers who need a reliable device with an efficient output. There’s a lot to enjoy from this vape mod. If you’re interested in an AIO box mod, you’d do well to it out. Let us know what you think about this device in the comment section.

Published: March 17, 2023Updated: May 2, 2023

Vaping Daily Team

The Vaping Daily team is a collective of expert vapers. We tried hundreds of vapes and happily review them here. Our guides, reviews, and top lists share the best practices from our experience . Subscribe to e-mails to get vape news and deals.


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