Geekvape Aegis Solo 5 vs Solo 3: what are the differences and which one should you choose?

The Geekvape Aegis Solo 5 doesn’t replace the Solo 3 by simply increasing the power: both remain capped at 100W. The real upgrades lie elsewhere: 21700 compatibility, a larger screen, a new locking system, and the new Z Subohm Tank 5.

For someone who already owns an Aegis Solo 3, the question is a fair one: is it really worth upgrading to the Solo 5? And if you’re buying a new one, which best suits your needs?

Aegis Solo 5 vs. Solo 3: key differences

Feature	Aegis Solo 3	Aegis Solo 5
Maximum power	100W	100W
External battery	18650	18650 or 21700
Screen	0,96"	1,08"
Lock	Touch-Lock	A-Lock + indicator
Protection	IP68 Tri-Proof	IP68 Tri-Proof
Charging	USB-C 5V/2A	USB-C 5V/2A
Kit tank	Z Subohm Tank 2021	Z Subohm Tank 5
Included coils	Z Series	Z XM Boost

This table mainly compares the 18650 external-battery version of the Solo 3 with the Solo 5. VAPEVO also offers versions of the Solo 3 with a built-in battery.

The biggest change: the 21700 battery

This is probably the most significant upgrade. The Geekvape Aegis Solo 5 100W accepts either a 21700 or an 18650 battery thanks to the included adapter.

The Geekvape Aegis Solo 3 with an external battery runs on an 18650.

At high power, a good 21700 battery can provide greater capacity and therefore longer battery life. This is particularly useful with coils used at around 50 to 80W.

Power remains at 100W

Geekvape hasn’t tried to make the Solo 5 a more powerful mod. Both generations are capped at 100W, which is still appropriate for a single-battery device.

The Solo 5 therefore retains the Solo philosophy: delivering high power in a more compact form factor than a dual-battery mod.

A 1.08" screen on the Solo 5

The Solo 3 has a 0.96-inch screen. The Solo 5 steps up to 1.08 inches with a redesigned graphical interface.

The difference isn’t huge on paper, but it improves readability of the key information:

• power;
• battery level;
• resistance value;
• operating mode;
• lock status.

Touch-Lock versus A-Lock

The Solo 3 highlights its Touch-Lock system, which detects when you pick it up. On the Solo 5, Geekvape returns to a more explicit A-Lock system, with a status indicator.

The choice is partly a matter of preference. Some users appreciate the automation of Touch-Lock; others prefer a more predictable mechanical/manual lock.

The Z Subohm Tank 5 changes more than the mod itself

The Solo 5 kit comes with the new 5.5ml Z Subohm Tank 5. The Solo 3 is paired with the Z Subohm Tank 2021.

The new tank retains the top-airflow design that made the Z range famous, but adopts a newer generation of filling system and coils.

The Solo 5 comes with:

• a Z0.2 XM Boost 0.2Ω coil, recommended between 70 and 80W;
• a Z0.4 XM Boost 0.4Ω coil, recommended between 50 and 60W.

The 0.2Ω coil is designed for a more airy, intense DTL vape. The 0.4Ω coil reduces power consumption and may be more comfortable for preserving battery life.

Both remain IP68-certified

The Solo 5 doesn’t compromise Aegis’s DNA. Both devices feature Tri-Proof construction with IP68 certification, designed to improve resistance to water, dust and shocks under the conditions specified by the certification.

This is an important point for users who choose Aegis specifically for its durability.

Solo 5: Who really benefits from the 21700?

The 21700 is especially worthwhile if you:

• vape regularly above 50W;
• use a 0.2Ω or 0.4Ω coil;
• want to limit battery changes throughout the day;
• don’t want to switch to a dual-battery mod.

At more moderate power levels, a good 18650 can still be perfectly suitable.

Should you replace your Solo 3 with the Solo 5?

Not necessarily. If your Solo 3 works perfectly and its battery life suits you, the improvement won’t be revolutionary.

The move to the Solo 5 is most worthwhile if you’re looking for:

• 21700 compatibility;
• a slightly larger screen;
• the new A-Lock;
• the Z Subohm Tank 5;
• the Z XM Boost coils.

Which model should you choose for your first Aegis Solo?

For a new purchase, the Solo 5 is currently the most logical choice if you want the latest generation and potentially longer battery life thanks to the 21700.

The Solo 3 is still a great option if you already own several 18650 batteries and prefer its Touch-Lock system or wider range of modes.

Which e-liquid should you use?

Both kits are designed for sub-ohm RDL/DTL vaping. With Z Series coils used at high wattages, liquids with a relatively high VG content are often best suited.

To understand the relationship between coil resistance and viscosity, see our guide E-liquid too thick or too thin: choosing the right PG/VG ratio.

Aegis Solo 5 vs Solo 3 FAQ

Is the Solo 5 more powerful than the Solo 3?

No. Both have a maximum output of 100W.

Can you use an 18650 battery in the Solo 5?

Yes. The Solo 5 accepts a 21700 or an 18650 with the included adapter.

Is the Solo 5 compatible with Z Series coils?

The Z Subohm Tank 5 remains part of the Z Series ecosystem and comes with the new Z XM Boost coils, among other features.

Does the Solo 5 have better battery life?

With a suitably sized 21700 battery, it can offer longer battery life than an external Solo 3 limited to the 18650 format, with similar use.

Verdict

The Solo 5 is a logical evolution rather than a revolution. Geekvape retains 100W and IP68, but improves what mattered most in a single-battery device: potential battery life thanks to the 21700, the screen, the lock, and the tank.

To see the two models currently available, compare the Aegis Solo 5 and the Aegis Solo 3 on VAPEVO.

Sources: Geekvape, official Aegis Solo 5 and Aegis Solo 3 product sheets; VAPEVO catalog verified on November 3, 2026.