Sourcing battery-monitoring ICs from China
Battery-monitoring ICs from China under heading 8542 carry 0% UK duty across the listed lines. Business-to-business components are outside RoHS scope, but an in-scope finished assembly must comply. Specify the exact part and verify its measurement performance. Cambridge China Bridge sources battery-monitoring ICs.
Duty and classification for battery-monitoring ICs
Heading 8542 covers electronic integrated circuits. This guide concerns loose battery-monitoring chips, rather than assembled battery-management boards or battery packs. The table gives potential lines for different chip constructions and functions, not interchangeable codes for the same part. See the integrated circuits and chips guide for the wider heading.
Read from the UK Trade Tariff on 9 October 2026, every listed line carried 0% duty for goods from China. The supplied tariff record lists no anti-dumping or countervailing duty, suspensions or attached import controls. Import VAT is separate from duty; see UK import duty and VAT.
Give your customs broker the manufacturer's datasheet, package details and functional description. Confirm whether the device is a monitoring circuit, controller or multi-component integrated circuit before choosing the commodity code. Do not copy a board's code onto an order for loose chips.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Other integrated circuits, including battery-monitoring chips where classified here | 8542 39 90 00 | 0% | None |
| Other multi-component integrated circuits meeting the chapter note | 8542 39 11 00 | 0% | None |
| Other integrated circuits meeting the chapter note, excluding multi-component types | 8542 39 19 00 | 0% | None |
| Other processors and controllers for battery-management designs | 8542 31 90 00 | 0% | None |
Specify the battery measurement function
State the manufacturer's complete part number, revision, package and temperature grade. Specify battery chemistry, supported cell arrangement, cell-voltage input range, measurement accuracy, current-sensing method and temperature inputs. Confirm communication interface, sleep current, balancing outputs and fault reporting where these functions are needed.
Agree a sample test using your intended circuit and simulated cell inputs before accepting production stock. Include measurement drift, wake-up behaviour, open-wire detection and balancing operation where supported. Record which functions belong to the chip and which require external circuitry or software.
For Great Britain, components sold business to business are outside RoHS scope, but an in-scope finished assembly including those components must comply. Its manufacturer must establish component compliance before incorporation. Request part-specific material declarations and supporting records rather than relying on a generic supplier certificate.
Worked duty example
Illustrative example, not a quote: Illustrative order: 50,000 battery-monitoring chips on reels under 8542 39 90 00, invoiced at £40,000 free on board, with £600 of freight and insurance to the UK. The customs value is £40,600. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £40,600, so it is £8,120. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.
Inspection checklist
Identity: match chip markings, package, revision, reel labels and lot records to the approved part. Investigate mixed lots or altered markings.
Electrical performance: test samples against the datasheet using simulated cell voltages and known current-sense inputs. Check temperature readings and communication in the intended circuit.
Handling: inspect sealed moisture barrier bags, desiccant and humidity indicators. Check leads or pads for damage and oxidation, and preserve protection against static discharge.
Traceability: reconcile quantities and supplier records with each reel. Retain samples and test results by lot; use X-ray screening for suspect broker stock.
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What goes wrong
A similar-looking substitute can have different input limits, register behaviour or balancing control. It may communicate with the host yet report incorrect cell voltages. Approve substitutions through circuit testing, and include sleep and wake-up behaviour rather than checking readings only while the device is active.
Remarked or reclaimed chips can lose traceability, while damaged dry packaging can cause failures during assembly. Separate suspect reels, compare them with approved samples and investigate before release. A chip test also cannot establish the performance of the complete battery-management system.
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 battery-monitoring ICs from China?
The supplied tariff record shows 0% duty across heading 8542, with no anti-dumping or countervailing duty. Import VAT is separate.
Which commodity code covers a battery-monitoring chip?
The code depends on the chip's function and construction. Give your broker its datasheet and package details; do not assume every battery-monitoring device uses the same line.
Do loose battery-monitoring chips need UKCA marking?
Confirm with the relevant authority whether UKCA marking applies to the supplied components, consulting the wider chips guide when preparing that assessment. Assess the finished product's applicable requirements separately and obtain component compliance records.
How do I check a substitute battery-monitoring IC?
Compare the complete datasheets and test it in your circuit. Check cell readings, current sensing, communication, sleep behaviour and supported fault detection before approving the substitution.