The Eleaf iStick X40 and Geekvape Aegis Hero 5 are both compact MTL-focused devices, but they take different approaches to power and battery design. This comparison looks only at the specs provided, calling out where one device has a clear edge and where the evidence simply isn’t enough to declare a winner.
Below we break the matchup into performance, battery, build, convenience, and capacity, using the actual figures from each product’s spec sheet rather than assumptions.
| Spec | Eleaf iStick X40 | Geekvape Aegis Hero 5 |
|---|---|---|
| Image |  |  |
| Max outputPerformance | 40 W | 🏆 50 W |
| Battery typeBattery | removable | 2000mAh internal rechargeable |
| Battery capacityBattery | 🏆 3000 mAh | 2000 mAh |
| Durability ratingBuild | Not stated | IP68 |
| DisplayConvenience | Yes | Yes |
| Charging portBattery | USB-C | Type-C |
| Coil/tank compatibilityCapacity | 0.4Ω, 0.8Ω, and 1.2Ω | Geekvape B Series coils |
| Vaping stylePerformance | MTL | MTL, RDL, and light DTL |
| Safety protectionsBuild | Usual | Not stated |
| Build materialBuild | lightweight zinc alloy | not stated |
| Best US priceat time of comparison | $49.90* | $34.99* |
| Read Review & Best Price | Read Review & Best Price |
* Lowest US price we found on 18 Aug 2026. Prices change often — see each review below for live pricing.
Performance
The Geekvape Aegis Hero 5 tops out at 50 W compared to the Eleaf iStick X40’s 40 W, giving it the higher maximum output on paper. The Aegis Hero 5 also lists a broader vaping style range (MTL, RDL, and light DTL) versus the iStick X40’s MTL-only listing, though that vaping style comparison itself has no stated winner since the two aren’t directly measured the same way. Based on max output alone, the Geekvape Aegis Hero 5 takes this category.
Battery
The Eleaf iStick X40 wins on battery capacity with 3000 mAh against the Geekvape Aegis Hero 5’s 2000 mAh, a meaningful difference in raw runtime potential. The two also differ in battery type — the iStick X40 uses a removable cell while the Aegis Hero 5 has a 2000mAh internal rechargeable battery — but since these are different formats rather than comparable numbers, no winner is assigned for battery type itself. On capacity specifically, the iStick X40 has the clear numerical advantage.
Build
The Eleaf iStick X40 lists a lightweight zinc alloy build while the Geekvape Aegis Hero 5’s build material is not stated, and the Aegis Hero 5 carries an IP68 durability rating while the iStick X40’s durability is not stated. With key details missing on each side, there isn’t enough matching evidence to call a build winner.
Convenience
Both devices include a display, and both use a USB-C style charging port (listed as “USB-C” for the Eleaf iStick X40 and “Type-C” for the Geekvape Aegis Hero 5), though the charging port comparison has no declared winner since the listings aren’t verified as identical specs. On the display feature, the two are tied.
Capacity
The capacity category pulls in factors like coil compatibility, which differ in kind rather than degree — the Eleaf iStick X40 supports 0.4Ω, 0.8Ω, and 1.2Ω coils, while the Geekvape Aegis Hero 5 uses its own Geekvape B Series coils. Because these are different ecosystems rather than comparable numbers, there isn’t enough evidence to name a winner here.
The Eleaf iStick X40 suits vapers who prioritize a larger 3000 mAh removable battery over higher wattage.
The Geekvape Aegis Hero 5 suits vapers who want higher maximum output at 50 W and a stated IP68 durability rating.
The verdict
Neither device comes out ahead across the board. The Geekvape Aegis Hero 5 offers higher max output and a listed IP68 durability rating, while the Eleaf iStick X40 offers a larger removable battery. Build quality and coil/tank capacity can’t be fairly judged from the available specs, and convenience features like the display are tied. Choosing between them comes down to whether higher wattage and durability or larger battery capacity matter more for a given buyer.