Overview
Ever wish you could carry two different cartridges without juggling two batteries? The Ooze Duplex 2 does exactly that. It's a dual 510 battery with both carts hidden inside, so you can flip between them on the fly.
One catch: you can only buy it in bundles.
What We Tested
Our hands-on testing methodology
Unit Tested
Ooze Duplex 2 Upgrade Kit
Testing Period
6 days of use
Cartridges Tested
4 different carts in both slots
Voltages Tested
Low, medium, and high settings
Dual System Tested
Switching mechanism, concealment
Use Cases Tested
Day/night strain switching
Design & Build Quality
Fitting two 510 connections into something pocket-friendly isn't easy, but the Duplex 2 pulls it off. Both cartridges tuck away inside the body. Nothing sticking out. Still discreet.
Available Bundles
- Duplex 2 Upgrade Kit Bundle
- Duplex 2 Refill Bundle
- Duplex 2 Duo Bundle
Features
Dual Cartridge Design
This is the whole point:
- Two 510 connections
- Quick switching between carts
- Both concealed within body
- Independent selection
Use Cases
Works great for:
- Day/Night strains - Sativa for day, Indica for night
- CBD/THC combo - Keep both accessible
- Different flavors - Variety without swapping
- Backup ready - Second cart when first empties
Variable Voltage
Different oils need different heat. Here's the breakdown:
| Voltage | Best For |
|---|---|
| Low | Thin oils, flavor |
| Medium | Standard cartridges |
| High | Thick oils, clouds |
Performance
Switching Between Cartridges
A simple selector picks which cartridge fires. No unscrewing anything. Just switch and go. You'll always know which one's active.
Vapor Quality
Vapor depends on your cartridges, not the battery. The Duplex delivers consistent power, so what you taste is what your cart produces.
Battery Life
Here's the tradeoff: both cartridges share one battery. Heavy users will want to charge more often. USB-C makes that quick, at least.
Who Is It For?
Ideal Users
- Medical users juggling multiple strains
- People who like variety
- Anyone with a day strain and a night strain
- Folks tired of swapping carts constantly
Considerations
Single-cart batteries are smaller and lighter. If you only use one cartridge, this is overkill. And remember, both carts pull from the same battery pool.
Bundle Value
Since it only comes in bundles, factor in everything you're getting: charging accessories, replacement parts, and carrying solutions. The package deal often beats buying pieces separately.
Maintenance
- Keep both 510 connections clean
- Clean selector mechanism
- Charge regularly
- Check that cartridges seat properly
Pros & Cons
Pros:
- True dual-cart convenience
- Instant strain switching
- Concealed design
- Good bundle value
- Variable voltage
Cons:
- Bundle-only purchase
- Shared battery capacity
- Larger than singles
Verdict
The Duplex 2 solves a real problem. Instead of carrying two pens or constantly swapping cartridges, you get both ready to go in one device. The bundle-only format actually works in your favor since you get accessories included. If you switch between strains regularly, this makes a lot of sense. Compare other dual-cart options in our best 510 thread batteries roundup.
Related: Ooze Duplex 2 User Manual