VooPoo Uforce-X vs FreeMax M Pro 3: Sub-Ohm Tank Comparison

The short answer: pick by coil ecosystem, not tank shape

Both the VooPoo Uforce-X and FreeMax M Pro 3 are sub-ohm tanks with sliding top-fill systems, but they belong to different coil families. The Uforce-X uses VooPoo PnP-X coils, while the M Pro 3 is compatible with FreeMax M Pro 2 coils. If you already own coils from one family, that compatibility should decide your purchase before capacity or airflow do.

The Uforce-X holds 5.5mL and includes both a 0.15 ohm and a 0.2 ohm PnP-X coil plus a spare glass tank. The M Pro 3 holds 5mL, uses stainless steel and Pyrex glass, and adds adjustable bottom airflow with an 810 wide-bore drip tip. Neither record includes wattage ranges or recommended power settings, so you will need to confirm those on the coil packaging or manufacturer documentation before use.

Capacity and refill routine

• VooPoo Uforce-X: 5.5mL capacity with a sliding top-fill system. The package includes a spare 5.5mL glass tank, so you have a replacement on hand if the original glass breaks.
• FreeMax M Pro 3: 5mL capacity with a sliding top-fill system. The included accessories list replacement glass and O-rings, which cover common wear parts.

Coil compatibility and what comes in the box

• VooPoo Uforce-X Sub-Ohm Tank: Compatible with the VooPoo PnP-X coil series; includes one 0.15 ohm PnP-X coil and one 0.2 ohm PnP-X coil. Two included coils let you try both resistances before buying a replacement pack, and the PnP-X family determines your long-term coil cost and availability.

  

• FreeMax M Pro 3 Tank: Compatible with FreeMax M Pro 2 coils. If you already use M Pro 2 coils on another tank, the M Pro 3 lets you keep that coil stock rather than starting a new collection.

  

Airflow and drip tip: where the M Pro 3 is more explicit

The FreeMax M Pro 3 record specifies adjustable bottom airflow and an 810 wide-bore drip tip. Those details give you a clear starting point for tuning draw tightness and for matching replacement tips. The VooPoo Uforce-X record confirms a sliding top-fill system but does not list airflow adjustment or drip tip size, so treat those as unconfirmed rather than absent. If airflow control is a priority, the M Pro 3 is the safer choice based on the supplied information.

Size and materials at a glance

• VooPoo Uforce-X Sub-Ohm Tank: Dimensions: 52.95mm x 29mm; materials: zinc-alloy and glass. The shorter height may sit differently on a mod than the M Pro 3, which matters if you carry your setup in a pocket or small case.
• FreeMax M Pro 3 Tank: Dimensions: 59.85mm x 28mm; materials: stainless steel and Pyrex glass. The M Pro 3 is taller and slightly narrower, and the stainless steel and Pyrex glass construction is a different material mix from the Uforce-X.

Decision rules for choosing between them

• You already own PnP-X coils: Choose the VooPoo Uforce-X. It uses the PnP-X series and includes two coils to get started.
• You already own M Pro 2 coils: Choose the FreeMax M Pro 3. It is compatible with M Pro 2 coils, so your existing stock carries over.
• You want confirmed airflow adjustment: Choose the FreeMax M Pro 3. Its record lists adjustable bottom airflow; the Uforce-X record does not confirm airflow control.
• You want the larger capacity and a spare glass in the box: Choose the VooPoo Uforce-X. It holds 5.5mL and includes a spare 5.5mL glass tank.
• You need wattage guidance before buying: Neither supplied record lists recommended wattage ranges. Check the coil packaging or manufacturer documentation for both tanks before committing.