Introduction
The Wulf Mods UNI 3.0 continues the popular UNI line of universal 510 batteries. "Universal" means adjustable—both the width and height of the cartridge chamber adapt to fit virtually any 510-threaded cartridge on the market, from slim 0.5-gram options to large 2-gram tanks.
The UNI 3.0 adds a full digital display with customizable backgrounds, precise 0.1-volt adjustments, and USB-C charging. For users who want complete control over their cartridge experience, it offers features that simpler batteries cannot match.
Design and Build
The UNI 3.0 uses a box mod form factor that prioritizes function over compactness. The rectangular shape accommodates the digital display and adjustment mechanisms while keeping cartridges protected within the housing.
Build quality is solid if not premium. The plastic body is durable and lightweight, though users accustomed to metal batteries may find it less satisfying in hand. The trade-off is reduced weight and cost.
Universal Fit System
The signature feature is the dual-adjustment system:
Width adjustment: A dial on top expands or contracts the cartridge chamber from 11mm to 16mm diameter. This accommodates everything from slim pen cartridges to thick tanks.
Height adjustment: A slider on the back raises or lowers the cartridge position, fitting cartridges 42mm and taller. Even large 2-gram cartridges sit properly.
The magnetic 510 adapter makes cartridge swapping quick—no threading required. Drop your cartridge in and the magnet holds it securely.
Digital Display
The full-body display shows:
- Current voltage setting
- Battery level indicator
- Preheat countdown
- Custom background graphics
You can customize the background through the UI menu, including the Wulf Mods logo option. While largely aesthetic, the display makes checking settings convenient.
What's in the Box
- Wulf Mods UNI 3.0 battery
- 510 magnetic adapter
- USB-C charging cable
- User manual
Voltage Control
The UNI 3.0 offers the widest voltage range in its class:
Range: 1.8V - 4.2V
| Voltage | Best For |
|---|---|
| 1.8-2.4V | Ultra-thin oils, maximum flavor |
| 2.5-3.0V | Standard cartridges, balanced |
| 3.1-3.6V | Thicker oils, more vapor |
| 3.7-4.2V | Very thick concentrates, maximum vapor |
0.1V Precision
Unlike batteries with preset levels, the UNI 3.0 adjusts in 0.1V increments. Use the +/- buttons to dial in exactly the voltage you want. This precision helps optimize each cartridge's performance.
Button Functions
| Action | Function |
|---|---|
| 5 clicks | Power on/off |
| 2 clicks | Preheat (10-second cycle) |
| 3 clicks | Access UI/background menu |
| Hold + button | Increase voltage |
| Hold - button | Decrease voltage |
| Hold power | Fire/heat cartridge |
The multiple functions create a learning curve, but provide comprehensive control once familiar.
Performance
Cartridge Compatibility
The universal fit system works as advertised. In testing:
- Slim pen cartridges (11mm): Secure fit with dial at minimum
- Standard cartridges (12-14mm): Easy adjustment
- Large tanks (15-16mm): Maximum dial setting accommodates
- Tall 2-gram cartridges: Height slider extends fully
The magnetic adapter holds cartridges firmly without wobbling.
Vapor Production
Performance depends on your voltage setting and cartridge quality. The UNI 3.0's wide range means you can optimize for any cartridge:
- Low voltages (1.8-2.4V) preserve flavor but produce light vapor
- Medium voltages (2.5-3.2V) balance flavor and production
- High voltages (3.3-4.2V) maximize clouds but may sacrifice taste
Preheat Function
The 10-second preheat cycle warms thick oils before drawing. Double-click to activate—the display shows a countdown. This improves first hits with viscous concentrates that might otherwise require multiple draws to flow.
Battery Life
The 650mAh battery provides solid longevity:
- Light users: Multiple days between charges
- Moderate users: Full day comfortably
- Heavy users: May need evening charging
USB-C charging reaches full capacity in approximately one hour. The display shows battery level, eliminating guessing about remaining charge.
Safety Features
15-Second Cutoff
If you hold the fire button longer than 15 seconds, the device displays "OVERTIME" and stops heating. This prevents overheating and conserves battery.
Additional Protections
- Low battery warning before shutdown
- Short circuit detection
- Overheat protection
Who Should Buy the UNI 3.0
Multiple cartridge users: The universal fit means one battery works with all your cartridges, regardless of brand or size.
Control seekers: The 0.1V increments let you dial in exactly the right voltage for each cartridge.
2-gram cartridge users: The extended height adjustment fits large cartridges that many batteries cannot accommodate.
Feature enthusiasts: Digital display, customizable backgrounds, and precise controls appeal to tech-oriented users.
Who Should Look Elsewhere
Simplicity seekers: If you just want to click and vape, simpler batteries with preset voltages are easier.
Pocket priority: The box mod form factor is larger than pen-style batteries—less pocketable.
Premium feel: The plastic construction, while durable, lacks the heft of metal alternatives.
Budget shoppers: At around $35, cheaper basic batteries exist if features are not needed.
Comparison to Competitors
vs. Yocan UNI Pro
Both are universal 510 batteries with displays and adjustable fit. The Yocan may feel more premium with metal construction. The Wulf UNI 3.0 offers customizable backgrounds and slightly wider voltage range. Performance is similar.
vs. Basic 510 Batteries
Basic batteries are smaller and simpler but lack universal fit, display, and precise voltage control. The UNI 3.0 costs more but provides significantly more versatility.
vs. Wulf Mods Grid
The Grid is Wulf's budget option—smaller with four preset voltages instead of precise adjustment. Choose UNI 3.0 for features, Grid for simplicity and savings.
Final Verdict
The Wulf Mods UNI 3.0 earns its "universal" name. The adjustable fit system genuinely accommodates virtually any 510 cartridge, and the precise voltage control lets you optimize each one. The digital display adds convenient feedback and customization options.
The box mod form factor and plastic construction are trade-offs for the feature set. Users wanting compact simplicity should look elsewhere. But for those who use multiple cartridge types or want precise control over their sessions, the UNI 3.0 delivers excellent value and versatility.
Related: Wulf Mods UNI 3.0 Manual | Wulf Mods Grid Review