Sourcing lithium primary cells from China

Duty on lithium manganese dioxide primary cells

Read from the UK Trade Tariff on 20 October 2026, heading 8506 covers primary cells and primary batteries. The lithium lines cover cylindrical cells, button cells and other forms. This guide concerns lithium manganese dioxide cells, rather than rechargeable batteries. Cell parts are shown separately. For the wider heading, see lithium thionyl chloride batteries.

The selected lines carry 4% duty for goods from China, with no anti-dumping or countervailing duty recorded. A 0% suspension covers only qualifying lithium manganese dioxide button cells used in tyre-pressure monitoring manufacture. Ordinary retail button cells remain at 4%. The parts suspension concerns air-zinc cathodes, not lithium manganese dioxide parts. The tariff attaches an export control of mercury to these lines; ask your customs broker to confirm its relevance to the goods and transaction.

Classify the actual cell by chemistry and shape, using its datasheet and drawings. Do not claim the button-cell suspension solely because a cell uses lithium manganese dioxide: confirm the complete specification and manufacturing-use conditions first. Check the commodity code before ordering.

Specify chemistry, terminals and discharge conditions

Write lithium manganese dioxide primary chemistry into the purchase specification. Agree the cell dimensions, polarity, terminal arrangement, welded tabs or leads, insulation and packaging. State the device's continuous load, pulse demand, operating temperatures and discharge cut-off voltage so the factory's capacity data can be compared with your application.

For Great Britain, confirm applicable battery substance restrictions with the relevant authority. Batteries must carry the separate collection symbol and chemical symbols where required. Obtain chemistry reports for the exact cell. The UK business first placing batteries on the market takes on producer responsibilities; establish the applicable registration route before selling. Confirm the dangerous-goods classification and any transport test summary requirements with the relevant transport authority or customs broker, and agree the freight arrangements before booking.

Worked duty example

Illustrative example, not a quote: Illustrative order: 10,000 cylindrical lithium manganese dioxide primary cells under 8506 50 10 00, invoiced at £12,000 free on board, with £600 of freight and insurance to the UK. The customs value is £12,600. Duty at 4% is £504. Import VAT at 20% is charged on the customs value plus duty, £13,104, so it is £2,620.80. Import taxes total £3,124.80; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £504 of duty. The import duty and VAT guide explains each step.

Inspection checklist

Identity: compare chemistry, dimensions, polarity, terminal positions and insulation with the approved sample; record batch and date codes.

Performance: sample each lot for open-circuit voltage and discharge testing under the agreed continuous and pulse loads; compare results with the approved discharge curves.

Condition: check seals, corrosion, leakage, damaged wrappers and loose tabs; retain samples for the agreed storage checks. Arrange quality inspection against the written specification.

Packaging: check terminal protection, lot traceability, collection markings and required chemical symbols. For button cells, check child-resistant packaging and clear swallowing warnings.

What goes wrong

A cell can fit the holder and show the expected open-circuit voltage yet deliver too little capacity under the device's pulse load. Old stock, poor seals or damaged tabs can also escape a visual check. Compare samples from the production lot with the approved performance data and investigate discrepancies before accepting the shipment.

Treat missing chemistry reports, mismatched test summaries and button-cell packs that children can open as issues to resolve before dispatch. Another common purchasing error is budgeting for the suspension without confirming its restricted manufacturing use.

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.