Eleaf continues to expand its iStick series with compact yet powerful devices designed for both new and experienced vapers. Eleaf iStick X80 Mod Kit and Eleaf iStick X40 Mod Kit are two GTL X Tank-equipped devices that focus on flavor-focused MTL (Mouth To Lung) vaping while offering different power levels and battery capacities.

Both kits share a similar design philosophy, including the GTL X Tank, GTL-D mesh coils, top-fill system, and adjustable airflow. However, the X80 targets users who want more power flexibility, while the X40 focuses on portability and longer battery efficiency.

Eleaf iStick X80 vs iStick X40 Quick Comparison

Specifications are based on Eleaf product information.

Eleaf iStick X80 Mod Kit Review

The Eleaf iStick X80 Mod Kit is the more powerful option in this comparison. Equipped with a 3200mAh built-in battery and up to 80W output, it provides more adjustment range for users who want to experiment beyond traditional MTL vaping.

Powerful 80W Output Performance

The biggest advantage of the iStick X80 is its wider wattage range. The device supports output from lower wattages for MTL vaping to higher settings for warmer vapor production and stronger flavor intensity.

Compared with the X40’s 40W limit, the X80 gives users more room to adjust vapor density and coil performance.

Advantages of iStick X80 Power:

• Higher maximum output
• Better compatibility with different GTL coils
• More vapor production options
• Suitable for users upgrading from pod systems

For experienced vapers who enjoy adjusting settings, the X80 offers more flexibility.

3200mAh Battery for Longer Sessions

The iStick X80 includes a 3200mAh battery, slightly larger than the X40’s 3000mAh battery. This helps support longer daily vaping sessions, especially when using higher wattage settings.

The USB-C 2A fast charging system also reduces charging downtime.

Smart Design and User Controls

The X80 features a 1.05-inch TFT display, multiple UI themes, power adjustment controls, and safety protections. Its smart chip helps simplify operation while providing more advanced functions for experienced users.

Eleaf iStick X40 Mod Kit Review

The Eleaf iStick X40 Mod Kit is designed as a compact MTL-focused device. With a 3000mAh battery and maximum 40W output, it provides enough power for daily nicotine salt or regular e-liquid vaping without unnecessary complexity.

Compact and Beginner-Friendly Performance

The X40 is easier to operate compared with higher-powered mods. Its 5-40W output range matches well with the included GTL-D 0.8Ω and 1.2Ω coils, delivering a smooth MTL experience.

It is a good choice for:

• New vapers
• MTL enthusiasts
• Users replacing traditional pod systems
• People who prefer simple wattage settings

Reliable 3000mAh Battery Life

The built-in 3000mAh battery provides excellent endurance for a compact device. Eleaf positions the X40 as an everyday vaping device capable of lasting extended periods depending on usage habits.

Compared with many small pod kits, the larger battery reduces the need for frequent charging.

GTL X Tank Performance Comparison

Both the X80 and X40 come with the GTL X Tank, which is one of the biggest strengths of these kits. The tank supports GTL coil compatibility and uses GTL-D mesh coils designed for stable flavor delivery.

GTL X Tank Features:

• Slide-open top filling design
• Adjustable top airflow
• Replaceable 510 drip tip
• GTL coil compatibility
• MTL-focused airflow control

The included GTL-D coils are available in:

• 0.8Ω coil: around 13-18W
• 1.2Ω coil: around 10-13W

These coils are optimized for smooth flavor and efficient e-liquid consumption.

Flavor and Vapor Experience

Eleaf iStick X80

The X80 produces a warmer and denser vape due to its higher power capability. It is better suited for users who like:

• Stronger throat hit
• More vapor volume
• Adjustable vaping styles

Eleaf iStick X40

The X40 focuses on a smoother MTL draw. It provides:

• Cooler vapor
• Better battery efficiency
• Lower e-liquid consumption

For traditional cigarette-style vaping, the X40 feels more natural.

Eleaf iStick X80 vs X40: Pros and Cons

Eleaf iStick X80 Pros

Up to 80W output
Larger 3200mAh battery
More adjustable performance
Better for experienced users
Supports multiple vaping styles

Eleaf iStick X80 Cons

Slightly larger design
More features may be unnecessary for beginners

Eleaf iStick X40 Pros

Compact and lightweight
Simple operation
Excellent MTL performance
3000mAh battery capacity
Beginner-friendly design

Eleaf iStick X40 Cons

Lower 40W power limit
Less suitable for high-power vaping

Which One Should You Buy?

The choice between the Eleaf iStick X80 Mod Kit and Eleaf iStick X40 Mod Kit depends mainly on your vaping style.

Choose the Eleaf iStick X80 if you want:

• More power adjustment
• Stronger vapor production
• A device that can grow with your vaping experience
• More flexibility with GTL coils

Choose the Eleaf iStick X40 if you prefer:

• Simple operation
• Compact size
• MTL vaping
• Long battery life with moderate power

Final Verdict

Eleaf iStick X80 Mod Kit is the better all-around choice for experienced users who want more control and performance, while the Eleaf iStick X40 Mod Kit is the ideal option for beginners and MTL-focused vapers looking for simplicity.

Both devices deliver excellent flavor through the GTL X Tank platform, but the X80 wins in versatility, while the X40 wins in convenience and ease of use.