Overview
Ever stared at those colored LEDs on your battery and thought "okay but what voltage is that actually?" The Ooze Digit fixes that problem. It slaps a digital screen on a pen-style 510 battery so you can see the exact voltage you're running. No more guessing if green means 2.8V or 3.2V.
What We Tested
Our hands-on testing methodology
Unit Tested
Ooze Digit (Black)
Testing Period
8 days of use
Voltage Range
Full digital range
Cartridges Tested
6 different carts
Battery Life
400mAh capacity
Display Tested
Voltage accuracy verified
Design & Build Quality
The Digit looks like a regular pen battery. Ooze added a small screen but kept everything compact. You're not hauling around a chunky mod here.
Color Options
- Rainbow
- Gold
- Black
The Display
The screen shows:
- Exact voltage number
- Battery level indicator
- Puff counter (on some versions)
Features
Digital Voltage Display
This is why you'd buy the Digit over a cheaper option:
- Actual voltage numbers on screen (like 3.4V)
- No more decoding LED colors
- Dial in exactly what you want
- Know your settings every time
Variable Voltage Control
You get full control across the voltage range:
| Voltage | Experience |
|---|---|
| 2.0-2.5V | Light, flavorful |
| 2.6-3.2V | Balanced |
| 3.3-3.8V | Bigger clouds |
| 3.9V+ | Maximum power |
Compact Form Factor
Even with the screen, this thing stays small:
- Fits in your pocket
- Lightweight
- Easy to take anywhere
- Doesn't draw attention
Performance
Precision Vaping
The screen changes how you use the battery:
- Same experience every time once you find your sweet spot
- Match settings to specific cartridges
- Repeat what works
- Actually track what you're trying
Battery Life
The 400mAh battery gets you:
- 100-150 puffs per charge
- 1-2 days if you're a light user
- Daily charging for heavier vapers
- Screen barely dents the battery
Vapor Quality
Vapor is standard 510 stuff. The real win here is knowing your exact settings and being able to hit them again tomorrow.
Digital vs. LED Batteries
How They Stack Up
| Feature | Digit (Digital) | LED Battery |
|---|---|---|
| Voltage Display | Exact number | Color code |
| Adjustment | Precise | Preset only |
| Battery Info | Level shown | Colors only |
| Learning Curve | Minimal | Color memorization |
Who Benefits
The digital display makes the most sense for:
- Beginners figuring out what they like
- People who match settings to different carts
- Anyone tired of guessing what LED colors mean
- Vapers who like knowing the numbers
Usage
Basic Operation
- 5 clicks to power on
- Check your voltage on screen
- Adjust to where you want it
- Screw in your cartridge
- Hold the button and inhale
- Screen shows it's working
Finding Your Sweet Spot
- Start low
- Pay attention to flavor and vapor
- Bump it up a bit
- Found what you like? Note that number
- Use it every time
Who Should Buy
Ideal For
- People who want exact control
- Beginners still learning their preferences
- Anyone juggling different cartridge types
- Upgraders from basic $10 batteries
Skip It If
- Preset voltages work fine for you
- Battery life matters more than features
- You just want simple and screenless
Maintenance
- Wipe the screen now and then
- Don't let it get scratched up
- Clean the 510 threads
- Nothing special for charging
Pros & Cons
Pros:
- See your exact voltage
- No more LED guessing games
- $30 is reasonable
- Stays pocket-sized
- Screen is easy to read
Cons:
- 400mAh doesn't last long
- Only 3 color choices
- Screen could get scratched
Verdict
At $30, the Digit gives you something most pen batteries don't: actual voltage numbers instead of cryptic LED colors. If you've ever wondered what setting you're actually using, this solves that. The 400mAh battery won't last forever, but it'll get most people through a day or two. Compact enough to carry anywhere. For the price, it's a solid upgrade from basic batteries. See how it compares in our best 510 thread batteries roundup.
Related: Ooze Digit User Manual