Two orders can leave Shenzhen looking identical on a packing list and behave nothing alike at a border. One is a carton of dry devices with no oil inside them; the other is a finished consumer product. That single difference decides which documents are needed, who signs them and how long the shipment waits before release. This guide covers vape hardware logistics for buyers comparing empty vape cartridge shipping with prefilled goods, including what changes when you are shipping vape hardware to the USA.
The short version: empty hardware is electronics. A prefilled unit is a device that already contains oil, so it is an oil product that also happens to hold electronics. Everything downstream follows from that. The classification difference between the two is the subject of our guide on customs classification for empty vape hardware.
What exactly is inside a box of empty hardware?
Empty means empty. A battery, a porous ceramic core, a shell, a mouthpiece and the internal wiring, assembled and draw-tested, with no oil in the empty device at any point. Nothing sits in the ceramic core, nothing coats the airway, and there is no extract to declare.
That is also why no oil-side paperwork travels in the carton. hardware only – we do not supply or fill oil, so the oil, the fill volume and the compliance of the finished goods stay with your brand or your licensed filling partner. Our shipment is hardware, and it is declared as hardware.
Empty hardware vs prefilled product: who handles what?
Use the table as a division of work. It is a starting point for the conversation with your own forwarder, not a ruling on your market.
| Step | Empty hardware | Prefilled product |
|---|---|---|
| Export declaration documents | Covered through formal export declaration, which the manufacturing factory supports with its licences and product documents | Same export route, but the declared description and value lines describe a consumer product with oil inside it |
| Battery transport documents | UN38.3 test summary and the applicable lithium battery packing instruction travel with the goods | Identical – the cell and its documents do not change because oil is present |
| Destination classification | The importer and their customs broker classify the hardware for the destination market | Classification often changes, and the importer confirms the correct treatment with their broker |
| Oil-related compliance | Not applicable – no oil is present, and none is supplied by us | Belongs to the brand or the licensed filling partner, under the rules of the destination market |
| Labelling and warnings | Neutral factory packing; we print no artwork, claims or finished-product warnings | Designed and applied by the brand, because the finished product is theirs |
| Party carrying the goods on the market | The buyer, who places the hardware on the market | The brand or filling partner that put oil into the empty device |
Rules differ by country and they change. Your forwarder and your own counsel are the people who can confirm the position for your product and your destination.
How does the export declaration chain work?
Every shipment moves through formal export customs declaration, which requires those licences and product documents to be in place. That is why the cartons need a manufacturer of record rather than a loose consignment: the declaration has to be backed by export paperwork that matches what is physically in the boxes.
It also sets the boundary of our role. We prepare the hardware; the export declaration is backed by the licences and product documents held by the manufacturing partner that actually builds it, and your forwarder collects the goods against your instructions. Import clearance, duty and the market rules that apply once the goods land are handled in your country, by you or the broker you appoint – we do not clear goods at destination.
Battery documents that travel with the shipment
A lithium cell inside a device is regulated as dangerous goods in most markets, even when the cell is small. Three references come up in nearly every hardware shipment.
- UN38.3. The test summary for the cell, and the base document a carrier asks for before accepting lithium batteries.
- PI967 Section II. The packing instruction normally used for lithium ion cells contained in equipment, which is how a sealed device with a non-removable cell is presented.
- SP188. The conditions under which small cells can travel as Section II rather than as fully regulated cargo, covering package limits, state of charge and marking.
Which section applies depends on the cell rating, the number of units per package and the carrier’s own acceptance rules. Your forwarder confirms the exact packing instruction for each movement, and we supply the documents that sit on our side of it.
Sea freight or air freight – which fits your order?
Both accept lithium batteries contained in equipment, with different conditions attached to each.
Air freight suits samples, launch quantities and restocks, and it runs on a tight schedule. It also carries stricter per-package limits, state of charge conditions and more handling paperwork for battery goods, so the booking takes a little longer to prepare.
Sea freight suits volume, where a longer transit window is acceptable and the battery conditions are easier to satisfy in bulk. Consolidation is common, and the schedule is built around sailings rather than flights.
A pattern we see often: air for a first order while a market is being tested, sea for replenishment once volumes settle. Because we quote EXW Shenzhen, the routing is your call and your forwarder collects at our qualified manufacturing partner’s facility.
Why hardware-only keeps the paperwork narrow
A dry device is one product under one declaration, not two products stacked inside one shell. There is no oil line in the documents, no argument about which party put oil into the device, and no finished-product claim printed on our cartons.
For the importer that narrows the surface area. Classification, labelling and the market rules that touch the oil stay with the party that actually put oil into the device, and the hardware moves as hardware.
It is the same reason brands keep those two sides apart at product level, which we set out in the hardware-only model.
What happens before the first shipment leaves?
Hardware passes three quality stages before a channel sees it: 100 units to a US lab, 200 units to partner brands, who fill those units with their own oil for real-oil testing, and 500 units through channel trial sales. Those stages are ours. Your documentation decisions start earlier, so it is worth briefing your forwarder while the order is still in production.
Sample timing works the same way whether the goods fly or sail: blank samples ship in 2-3 days, while units with custom voltage or logo take 5-7 days. Samples are charged and shipping is at the buyer’s cost, and blank hardware leaves our qualified manufacturing partner’s facility dry.
Commercial terms do not change with the routing. MOQ is 3,000 pcs per model with production at 20-25 days, on 30% T/T deposit, 70% before shipment, and EXW Shenzhen. How those terms fit an import plan is covered in MOQ, lead time and payment terms when importing CBD vape pens from China, so this page stays on the shipping side.
One product note that shapes the oil side of any test: Our hardware is designed for thick CBD distillate-style oils and is not suited to nicotine e-liquids.
The hardware comes from ShenZhen Pulse Technology Co., LTD, founded in 2020, with a core team of 10+ years in CBD vaporisation hardware.
Send us the model, the destination country and whether the first movement is air or sea, and we will tell you which documents we provide and which ones your forwarder raises. Request a quote and a sample and we reply within one business day. If you are still settling the device itself, ask for a blank sample first and brief your forwarder in parallel.