Best OXVA Device for Least Refilling
If you hate refilling your pod multiple times per day, pod capacity and design matter more than any other spec. This guide ranks every OXVA device by how long you can go between refills.
OXVA Devices Ranked by Refill Frequency (Least to Most)
| Device | Pod Capacity | Refills Per Day | Days Between Fills |
|---|---|---|---|
| UNIONE | 10ml (2ml active + 8ml reserve) | 0.15 | 7 days approx |
| VPrime | 5ml | 0.5–2 (depends on wattage) | 0.5–2 days |
| NeXLIM | 4ml | 0.3–1 | 1–3 days |
| XLIM Pro 3 / Go 2 / Go Lite / 3 Ultra | 3ml | 1–2 | 0.5–1 day |
| XLIM SQ Pro 2 | 2ml | 1–2 | 0.5–1 day |
| SlimStick X | 2ml | 1–2 | 0.5–1 day |
The Clear Winner: OXVA UNIONE — Fill Once a Week
The UNIONE is built entirely around reducing refill frequency. Its patented dual-chamber system holds 2ml in the active vaping chamber and 8ml in a sealed reserve. As you vape the 2ml, it automatically draws from the reserve. Total capacity: 10ml — a full standard e-liquid bottle in one fill.
For an average vaper using 2–3ml per day, the UNIONE lasts approximately one week between fills. That is 7× longer than a standard 3ml pod kit like the XLIM Pro 3.
Perfect for: Busy people, forgetful refilers, travellers, anyone who resents fiddling with their device multiple times per day.
Browse UNIONE at Vapestore | Full UNIONE review
Second Best for Convenience: NeXLIM
The NeXLIM uses 4ml pods — 33% more capacity than the standard 3ml XLIM pods. In Eco mode, dual-mesh technology also extends pod lifespan to 15+ refills vs 8–12 for standard pods. For moderate vapers, the NeXLIM might only need refilling every 2–3 days.
Browse NeXLIM at Vapestore — £26.99 | Full NeXLIM review
VPrime: Highest Capacity but Fastest Drain
The VPrime has a 5ml pod — the largest single-chamber capacity in the OXVA range. But at 60W DTL wattage, it can drain that 5ml in 1–2 hours of heavy use. For MTL users at lower wattage, the 5ml pod lasts 1–2 days. Higher capacity, but does not beat the UNIONE for convenience.
The Refilling Inconvenience Problem
Standard 3ml pod kits need refilling 1–2 times per day for moderate vapers. Over a year that is 365–730 refill events. The UNIONE cuts this to approximately 52 refills per year. The convenience difference is substantial for busy lifestyles.
Find your ideal OXVA device with our quiz | Full OXVA pod lifespan guide