Pros
- Two cartridges simultaneously
- WPA with bubbler module
- Cooled vapor
Cons
- 510 cartridges only
- Small battery (650 mAh)
- Complex for beginners
Price Comparison (10 shops) 41–62 €
Last updated: 28/03/2026, 11:32 PM
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Specifications
| Heating Method | Conduction |
| Device Type | Pen |
| Brand | Pulsar |
| Power Source | 510 Mod |
| Heat-up Time | 5 seconds |
| Battery Capacity | 650 mAh |
| Warranty | 1 years |
| Water Pipe | View water pipe adapters |
| Material | Concentrates |
| Replaceable Battery | No |
| Passthrough Charging | No |
Source: Element VapeRetailer · Verified 19.02.2026
About this vaporizer
The Pulsar DuploCart H2O is a 510-cartridge battery with 650 mAh capacity, WPA port, and the ability to use two cartridges simultaneously. The built-in bubbler module delivers cooled concentrate vapor in 5 seconds.
- Two cartridges simultaneously
- WPA with bubbler module
- Cooled vapor
- 510 cartridges only
- Small battery (650 mAh)
- Complex for beginners
The Pulsar DuploCart H2O from Pulsar is a 510-thread vape pen with dual cartridge slots and built-in water filtration. Two cartridges fit simultaneously, but only one fires at a time -- switch between strains without unscrewing anything. The built-in 650 mAh battery offers three voltage levels (2.7 / 3.1 / 3.6 V). The water percolation cools and smooths the vapor before it reaches the mouthpiece.
Pulsar is a US-based manufacturer specializing in creative vape products. With 5 shops in the price comparison, the lowest price is easy to find.
See also: Pulsar APX V3 · Pulsar RoK · Pulsar APX E Rig · Pulsar Shift
Two Cartridge Slots -- One Device
What sets the DuploCart H2O apart: two 510-thread receptacles sit side by side on top. Both cartridges screw in and stay in place. A slide mechanism selects which cartridge fires.
This saves time when switching between different strains or concentrations. Instead of unscrewing one cartridge and replacing it, a flick of the slider is all it takes.
Compatible with standard 510 cartridges up to 10 mm diameter. Thicker CCELL cartridges or pod systems do not fit. The cartridges protrude from the top -- there is no fully concealed design like the CCELL Palm.
The dual-cartridge concept is rare on the market. Anyone who regularly uses two strains avoids the constant unscrewing and rescrewing.
Water Filtration for Cooler Vapor
The lower section of the DuploCart H2O contains a small water chamber. Vapor passes through water percolation before reaching the mouthpiece. This cools and moistens the vapor -- a softer draw than dry pens.
Filling is done through a side opening. About 5-8 ml of water is enough. Distilled water is recommended to prevent mineral buildup. The chamber should be emptied after each session so stale water does not accumulate.
Compared to a bong or water pipe, the filtration effect is more modest -- the chamber is small. Still, many users notice a tangible difference: less throat irritation and a smoother taste.
The DuploCart works without water too. The chamber stays dry and vapor flows unfiltered through the mouthpiece. Water filtration is optional, not mandatory.
Battery and Voltage Levels
The built-in 650 mAh battery delivers 250-350 puffs per charge -- more than most basic 510 pens. Charging is via USB-C on the bottom in roughly 60-75 minutes.
Three voltage levels are available:
| Level | Voltage | LED | Recommendation |
|---|---|---|---|
| 1 | 2.7 V | Green | Flavor, thin oils |
| 2 | 3.1 V | Blue | All-round |
| 3 | 3.6 V | Red | Thick extracts, clouds |
Switch levels with a triple click on the fire button. Power on/off with five clicks. A preheat function (double click, 2 seconds) warms the cartridge, useful in cold weather.
The fire button sits on the side and compared to inhale-activated pens offers an advantage: no accidental firing in a pocket, plus more control over draw duration.
Size, Cleaning, and What Is in the Box
The DuploCart H2O measures roughly 120 x 45 x 30 mm and weighs 85 g without cartridges. For a 510 pen with water filtration, that is compact -- but noticeably larger than a plain stick. It fits in a pocket but will be noticeable.
Clean the water chamber with warm water and occasional isopropyl alcohol. The mouthpiece detaches for separate rinsing. Empty the water after each use -- standing water turns unpleasant quickly.
In the box:
- DuploCart H2O unit
- USB-C charging cable
- Cleaning swabs
- User manual
Cartridges are sold separately. The price comparison across 5 shops shows current deals on the DuploCart H2O.
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