Asia – Mediterranean via Suez
Mediterranean services are the ones most likely to use Suez again (57% in September 2026), which puts the cargo back through Bab el-Mandeb, rated a SUBSTANTIAL threat.
Europe · sea freight from Guangzhou
Shipping from Guangzhou to Cascais
Guangzhou to Cascais
South China Sea · Malacca Strait · Indian Ocean · Bab-el-Mandeb · Suez Canal · Ionian Sea · Sicily Channel · Strait of Gibraltar
- GuangzhouChina origin
- South China Sea
- Malacca Strait
- Indian Ocean
- Bab-el-Mandeb
- Suez Canal
- Ionian Sea
- Sicily Channel
- Strait of Gibraltar
- CascaisPortugal
Lithium batteries for Cascais go through Guangzhou's Nansha terminals, which since September 2026 accept Dongguan-inspected battery boxes without a second check. On the way they face a Suez corridor that Mediterranean services are using again more than any other Asia–Europe lane, and they arrive at the port of Cascais.
The Portuguese side adds SILiAmb registration to the EU battery rules. This page sets out 6 points specific to this route, how Anxin handles each one and which documents to prepare.
What we need to start
- Typhoon season Jun–Oct
- Nansha export
- EU declaration of conformity
- SILiAmb / APA registration
- Portuguese-language safety information
Route profile
How Guangzhou → Cascais differs from other lanes
Portugal
An annual SILiAmb declaration, a licensed management entity or individual system, and EU importer duties from the declaration of conformity to the importer's address on the battery.
Where this route gets difficult
6 pain points from Guangzhou to Cascais
Loading port first, then the sea leg, then Cascais and the Portugal market.
- Origin port
Packaging certificate data now shared in Dongguan
Dongguan Customs and Dongguan MSA began sharing dangerous-goods packaging certificate data in September 2026, which they called a first in China, and agreed joint action on concealed and false declarations; Huangpu Customs runs a joint 'lithium batteries going overseas' service against misdeclaration as well. A mismatch between packaging certificate and MSA filing is visible to both.
What Anxin does: We check that the UN number, packaging code and quantities on the packaging certificate are exactly those on the MSA cargo report before either is submitted.
- Origin port
Pearl River typhoon season and rolled boxes
The tropical cyclone season in the region runs from June to October according to the Hong Kong Observatory, with July to September the busiest months. At Nansha, on the Pearl River mouth, a gate closure or a vessel change sends the DG filings and the packing certificate after the box to its new sailing.
What Anxin does: From June to October we leave slack between stuffing and the DG cut-off at Nansha and refile quickly if the vessel changes.
- Sea corridor
The inbound leg's emissions now count under EU ETS
Because Cascais is an EU port, container ships of 5,000 GT or more calling there fall under the EU Emissions Trading System, which covers half the emissions of the voyage from China. Lines surrendered allowances for 70% of those emissions in 2025 and must cover 100% from 2027, a cost that can reach shippers as a surcharge.
What Anxin does: We ask for the emissions surcharge to be shown as its own line in the quote, with the basis the carrier uses, so that successive quotes can be compared like for like.
- Import country
CE marking and a declaration of conformity in the right language
The importer in Portugal carries the check: CE marking on the battery and an EU declaration of conformity, translated into the language Portugal asks for, have both been required since 18 August 2024 for batteries entering the EU market.
What Anxin does: We ask the manufacturer in China for the declaration of conformity and a photo of the CE marking on the battery or its packaging before loading, and pass them to the Portugal importer. We check that the documents exist and match the goods; we do not assess conformity.
- Import country
Annex V testing for stationary energy storage
Stationary battery energy storage systems placed on the EU market since 18 August 2024 must be safe in normal operation, with technical documentation showing tests against the Annex V parameters, including thermal shock, short-circuit protection, over-discharge and thermal propagation. ESS buyers in Portugal increasingly ask for that file before delivery.
What Anxin does: For ESS cabinets and racks bound for Portugal we ask the manufacturer to confirm that the Annex V test documentation exists before booking and note the answer in the shipment file.
- Import country
User-replaceable batteries in appliances from 18 February 2027
Article 11 of the Battery Regulation says that from 18 February 2027 portable batteries inside appliances must be readily removable and replaceable by the end-user using commercially available tools, without heat or solvents, except under limited derogations. Appliances sold in Portugal after that date need a design that complies.
What Anxin does: When appliances with built-in batteries are booked for Portugal we point the importer to the February 2027 date so the manufacturer answers the design question before shipment; we do not assess compliance.
Documents & compliance
What to have ready: Guangzhou to Cascais
Test reports, safety data sheets and import certificates come from the shipper, factory and importer, not from Anxin; our part is to review them before booking.
In Guangzhou, before the box is loaded
- Packaging certificate and MSA cargo report cross-checked line by line (UN number, packaging code, quantity)
- Substance declaration covering mercury, cadmium and lead limits
- Safety data sheet and dangerous goods safe-carriage declaration for the MSA cargo report
- Customs packaging use-appraisal result for the dangerous goods packaging (with the maker's performance appraisal)
- Container packing certificate signed by a certified packing inspector after supervised stuffing
For the shipping line
- Routing (Red Sea or Cape) and any war-risk surcharge stated on the booking
- Lithium battery mark (SP188 cargo) or class 9 labels and placards
- Condition statement: new, used, damaged/defective (SP376) or for recycling (SP377)
For import into Portugal
- APA (SILiAmb) registration and management entity of the Portuguese producer
- Label and QR-code status against the August 2026 and February 2027 dates
Before you book
Send the file once, complete
Most delays on this route start with a document that exists but does not match: a UN number, a model name or a package count that differs between the Guangzhou filings, the carrier booking and the Portugal import file. We check the three against each other before the booking is confirmed.
Carriers we book with
Our booking panel; availability on this lane and acceptance of the declared UN numbers are confirmed for each booking. It does not mean that a listed carrier runs a direct service on this route. Carrier choice depends on the trade lane, cargo classification and each carrier's dangerous-goods acceptance at booking. The final carrier is confirmed on the booking.
Risk & mitigation
What could go wrong from Guangzhou to Cascais, and who acts
| Risk | Where | Mitigation | Who acts |
|---|---|---|---|
| Mismatch between packaging certificate and MSA filing flagged by shared data | Dongguan / Nansha | Line-by-line check before submission | Anxin with the declarant |
| Typhoon closure after filings are made | Nansha, Jun–Oct | Slack in stuffing date; prompt refiling | Anxin with the declarant |
| Emissions surcharge changes between quote and sailing | EU port call | Surcharge shown as a separate line | Carrier, checked by Anxin |
| Declaration of conformity missing or not in the required language | Importer in Portugal | Declaration and CE photo collected before loading | Manufacturer / importer |
| Storage system delivered without Annex V test file | Buyer in Portugal | Test documentation confirmed before booking | Manufacturer |
Questions
Common questions on the Guangzhou → Cascais route
The importer's: name, registered trade name or trade mark and postal address with a contact point, on the battery or, if it is too small, on the packaging or accompanying document.
Often: in September 2026, 57% of Asia–Mediterranean services used the Red Sea routing. Bab el-Mandeb was rated a SUBSTANTIAL threat by the JMIC on 24 September 2026, so we confirm each service's routing before booking.
Nansha MSA has recommended around 25% for ESS batteries and measures against accidental activation. Treat it as the local authority's recommendation; the carrier's own acceptance conditions also apply.
References
Regulations and port sources cited
- Registo de Produtores de Produtos (Agência Portuguesa do Ambiente)
- Registo de Produtores: Baterias (apresentação, 30.01.2026) (Agência Portuguesa do Ambiente)
- Regulation (EU) 2023/1542 on batteries and waste batteries (ELI) (EUR-Lex / Publications Office of the EU)
- Regulation (EU) 2023/1542 concerning batteries and waste batteries (Official Journal PDF) (EUR-Lex / Publications Office of the EU)
- JMIC Update 099 to Advisory Note (Joint Maritime Information Center (via UKMTO))
- Reducing emissions from the shipping sector (European Commission (DG Climate Action))
- Nansha MSA meeting on the safe carriage of energy-storage batteries (Guangzhou Nansha District Government)
- Forecasting yearly number of tropical cyclones affecting Hong Kong (tropical cyclone season June–October, most active July–September) (Hong Kong Observatory)
- Export dangerous goods packaging inspection: service guide (Chinese) (General Administration of Customs of China (Lanzhou Customs service guide))
Next step
From enquiry to import
- 1EnquiryCargo, origin, destination
- 2Documents checkUN 38.3, SDS, packing
- 3BookingAfter carrier acceptance
- 4HandoverAt Guangzhou
- 5ImportClearance at Cascais
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After you send it
We check carrier acceptance for Guangzhou → Cascais before any booking, and ask for missing battery documents first.
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