Compare Our Dual & Triple Cart Batteries
Every dual cart battery handles two cartridges, but they differ in battery capacity, whether you can control each cart's voltage separately, how wide a cart they accept, and how they fire. Here's a side-by-side of the multi-cart batteries in this collection so you can match one to how you actually vape.
| Battery |
Price |
Carts |
Capacity |
Voltage Control |
Max Cart Width |
Firing |
| Pulsar DL Tandem |
$29.99 |
2 |
650mAh |
5 levels, independent per cart |
14mm (2g) |
Auto-draw + button |
| Ooze Duet |
$19.99 |
2 |
650mAh |
5 levels (2.0–4.0V), shared |
15.9mm (2g) |
Left / right / both |
| Yocan Dubb |
$26.99 |
2 |
750mAh |
1.8–4.2V in 0.1V steps |
2g per slot |
Left / right / both |
| Hamilton Tombstone V2 |
$39.98 |
2 (+ wax coils) |
650mAh |
3 levels (2.8 / 3.2 / 3.8V) |
Standard 510 (CCELL) |
Auto-draw + button |
| Pulsar DuploCart |
$24.99 |
2 |
650mAh |
Variable, shared |
Standard 510 |
Button |
| Randy's Inspo Dual |
$32.99 |
2 |
1000mAh |
Variable, shared |
Standard 510 |
Button |
| HoneyStick DUO |
$25.99 |
2 |
650mAh |
Fixed |
10.7mm |
Auto-draw, left / right / both |
| Cartisan Veil Bar Duo |
$27.99 |
2 |
650mAh |
Variable, shared |
Standard 510 |
Button (water-pipe adapter) |
| Hamilton Starship |
$59.99 |
3 (+ wax coils) |
1450mAh |
3 levels (3.2 / 3.7 / 4.2V) |
Standard 510 |
Button (water-pipe adapter) |
| Hamilton Jetstream Triple |
$120 |
3 |
1800mAh |
Variable, shared |
Standard 510 |
Air pump + button |
Specs reflect current models in this collection and may update as inventory changes. Always confirm cart fit on the individual product page, especially for wide 2g cartridges.
How to Choose a Dual Cart Battery
Four things separate one dual battery from another. Sort these out and the right pick is usually obvious.
1. Firing Mode: Toggle vs. Simultaneous
Some dual batteries only let you switch between carts one at a time (toggle). Others add a mode that fires both at once for a blended hit — the Ooze Duet, Yocan Dubb, and HoneyStick DUO all offer a left/right/both selector. If your goal is keeping a backup cart loaded or rotating between two strains, a simple toggle is all you need. If you specifically want to mix two oils into one hit, make sure the model lists a "both" firing mode.
2. Independent vs. Shared Voltage
If you run two carts with different oil thickness — say a thin distillate and a thick live resin — independent voltage control lets you dial each one in separately. The Pulsar DL Tandem is the standout here with its own voltage level per cart, and the Yocan Dubb offers the finest control overall with 0.1V steps from 1.8–4.2V. On shared-voltage models the setting applies to whichever cart is active, which is perfectly fine if your two carts are similar. If fine voltage tuning matters most to you, our variable voltage batteries give you the widest range of adjustable options.
3. Cart Width (the spec people forget)
Dual batteries pack two slots into one body, so clearance can be tighter than a single-cart pen. Standard carts (around 10.5–11mm) fit almost everything here. Wide 2g carts only fit the slots built for them — the Pulsar DL Tandem (14mm), Ooze Duet (15.9mm), and Yocan Dubb (2g per slot) handle the widest carts, while compact models like the HoneyStick DUO top out around 10.7mm. If you run oversized carts, our 2g cart batteries are all built specifically for wide cartridges. Check the Max Cart Width column above before you buy.
4. Capacity and Charging
Firing two coils at once pulls roughly double the power, so capacity matters more on a dual than on a single. Most models here carry 650mAh; the Yocan Dubb leads the standard duals at 750mAh, and the triple-slot Hamilton Starship (1450mAh) and Jetstream (1800mAh) handle all-day multi-cart use. If raw battery life is your priority, our high-capacity 510 batteries go even further. If you mostly toggle rather than fire both, a 650mAh battery lasts about as long as a normal single-cart pen. Every current model charges over USB-C.
Who a Dual Cart Battery Is For
Dual and triple cart batteries earn their place when you refuse to commit to one cart at a time:
- Strain rotators — keep a sativa and an indica loaded and switch by time of day.
- Backup carriers — never get caught with an empty cart; the second slot is your spare, ready to fire.
- Flavor mixers — on models that fire both at once, blend two oils into a single custom hit.
- CBD + THC balancers — run one of each and dial the ratio by how often you hit each side.
If you only ever run one cart and want the smallest possible device, browse our full cart battery collection. For maximum discretion, see our concealed cart batteries.
Frequently Asked Questions
Can you fire both carts at the same time?
On most dual cart batteries, yes. Many models fire both cartridges simultaneously for a blended hit, while others toggle between them one at a time. The Ooze Duet, Yocan Dubb, and HoneyStick DUO all use a left/right/both selector. Check the product description to confirm which firing modes a specific battery supports.
Do dual cart batteries drain faster?
Only when you fire both carts at once, since you're pulling power through two coils together. For normal toggling use, battery life is comparable to a standard single-cart battery. Most dual batteries carry 650mAh or more, the Yocan Dubb holds 750mAh, and the triple-slot Hamilton models hold 1450–1800mAh.
What size cartridges fit a dual cart battery?
Any standard 510-thread cartridge works. The thing to watch is cart width — some dual batteries fit up to 10.7mm, while the Pulsar DL Tandem (14mm), Yocan Dubb (2g per slot), and Ooze Duet (15.9mm) take full 2g carts. Check the spec table above before buying if you run wide carts.
Can I use just one cartridge?
Yes. You can run a single cart and leave the other slot empty on nearly all dual batteries. Many include a dummy plug for the empty slot, so a dual battery stays flexible even if you usually carry one cart.
Can each cart have its own voltage?
On batteries with independent voltage control, like the Pulsar DL Tandem, yes — set one low for thin oil and one higher for thick oil. The Yocan Dubb offers the finest steps (0.1V). On simpler models the voltage applies to whichever cart is selected. The spec table above notes which devices offer independent control.
🔋 Want the Full Breakdown on Each One?
We tested and ranked every dual and triple cart battery in this collection — with specs, prices, pros and cons, and which one fits your setup.
Read our Best Dual Cart Batteries guide →
