Sourcing lithium thionyl chloride from China
Lithium thionyl chloride batteries from China carry 4% UK duty under the relevant lithium primary battery lines, with no listed trade remedy or suspension. UK businesses first supplying them on the UK market take on battery producer duties. Cambridge China Bridge sources lithium thionyl chloride batteries.
UK duty on lithium thionyl chloride batteries
Read from the UK Trade Tariff on 20 October 2026, heading 8506 covers primary cells and primary batteries. Cylindrical lithium cells fall under 8506 50 10 00; other lithium primary batteries may fall under 8506 50 90 90. The table separates terminal options sharing the cylindrical-cell code. See the primary battery guide for the wider heading.
Both relevant lines carry 4% duty for goods from China. The supplied tariff data lists no anti-dumping or countervailing duty and no suspension on these lines. Suspensions for specified lithium manganese dioxide, lithium iodine and lithium silver vanadium oxide cells do not describe lithium thionyl chloride batteries. The tariff attaches an export control of mercury; ask your customs broker to confirm its relevance, particularly if goods will be re-exported.
Confirm the finished battery's construction and chemistry before declaring its code. Terminal descriptions alone do not establish classification. Use finding your commodity code and give your broker the manufacturer's data sheet and assembly drawing.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Cylindrical lithium thionyl chloride cells with plain terminals | 8506 50 10 00 | 4% | None |
| Other lithium thionyl chloride primary batteries | 8506 50 90 90 | 4% | None |
Specify chemistry, pulse load and terminals
Specify lithium thionyl chloride chemistry, cell construction, dimensions, polarity, terminal arrangement and the intended device. Ask for discharge curves at the actual operating load and temperature, rather than accepting a capacity figure without test conditions. Include the device's start-up pulse and minimum operating voltage in the acceptance brief.
Ask the supplier to demonstrate voltage recovery after storage and performance during repeated pulses. Agree production-date coding, storage conditions and batch traceability. For wired assemblies, approve cable insulation, connector orientation and attachment strength against a physical sample.
Confirm the lithium cells' dangerous-goods classification and transport documentation requirements with the relevant transport authority or freight specialist; obtain the transport test summary and agree the freight arrangements before booking. Batteries need the separate collection symbol and chemical symbols where required. A UK business first supplying batteries on the UK market is a battery producer; registration depends on battery type and the amount supplied.
Worked duty example
Illustrative example, not a quote: Illustrative wholesale order of 500,000 cylindrical cells under 8506 50 10 00, invoiced at £50,000 free on board, with £3,000 of freight and insurance to the UK. The customs value is £53,000. Duty at 4% is £2,120. Import VAT at 20% is charged on the customs value plus duty, £55,120, so it is £11,024. Import taxes total £13,144; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £2,120 of duty. The import duty and VAT guide explains each step.
Inspection checklist
Identity: compare the chemistry, manufacturer, model and production-date code with the approved data sheet; retain samples linked to the shipment batch.
Performance: measure open-circuit voltage, then test discharge and start-up pulses in the intended device or an agreed equivalent load; record temperature and storage history.
Construction: check dimensions, polarity, terminal position, connector fit and attachment strength; inspect seals for leakage and terminals for corrosion.
Documents and marking: match safety reports and transport test summaries to the actual cell model; check the separate collection symbol, required chemical symbols and carton batch references.
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What goes wrong
A cell can show acceptable open-circuit voltage yet fail to start the buyer's device. Test the pulse profile after representative storage, including voltage recovery, rather than relying on an unloaded voltage reading. Capacity results are difficult to compare when suppliers use different loads, temperatures or discharge end points.
Wrong connectors, reversed polarity, weak terminal attachments and mixed production batches can make otherwise usable cells unsuitable. Hold affected stock while you trace the batch and compare it with the approved sample. Arrange quality inspection around the device's operating conditions.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.
Frequently asked questions
What is the UK import duty on lithium thionyl chloride batteries from China?
The relevant cylindrical and other lithium primary battery lines carry 4% duty. The supplied tariff data lists no anti-dumping or countervailing duty and no suspension for these lines.
What should I test before ordering lithium thionyl chloride cells?
Test capacity under the intended load, start-up pulses, voltage recovery after storage, dimensions and terminal fit. Record the temperature and discharge end point so results can be compared.
Do I become a battery producer when importing these cells?
Yes, if your business has a UK presence and is first in its selling chain to supply them on the UK market. Registration depends on the battery type and amount placed on the market.
Can I accept a test report for a similar battery?
Ask for reports and transport test summaries identifying the supplied model. Check the manufacturer, construction and terminal configuration against the actual goods before accepting the evidence.