No, usually not. A lithium coin or button cell, such as a CR2032, installed inside a consumer device is excepted from a Shipper's Declaration under IATA Dangerous Goods Regulations (DGR) Packing Instruction 970 Section II (air) and IMDG Code (International Maritime Dangerous Goods Code) Special Provision 188 (sea), provided the cell is installed rather than loose, the device guards against accidental activation, and the cell has passed UN 38.3 testing.
What Is the Small-Cell Exception for Lithium Button Batteries?#
The exception removes the Shipper's Declaration for Dangerous Goods (DGD), UN-specification packaging and Class 9 hazard labeling for small lithium metal cells shipped installed in equipment, as long as the cell and the equipment meet the conditions set out in the applicable packing instruction. It exists because a coin cell at typical retail content, around 0.1 grams of lithium in a CR2032, sits far below the 1 gram per-cell ceiling that triggers full dangerous goods treatment.
Lithium coin cells installed in consumer equipment are classed as UN 3091 (lithium metal batteries packed with or contained in equipment). On air, the governing text is IATA DGR Packing Instruction 970 Section II. On sea, it is IMDG Code Special Provision 188. Both excepted modes still require the air waybill or shipping document to carry a statement that the shipment complies with the relevant provision, and both still require the equipment's accidental-activation safeguard, such as a switch or pull tab, to be functional at the time of shipment.
This is the same UN number and the same battery class discussed in our broader look at Japan IOR for lithium battery imports, which covers the customs and compliance structure for bulk and non-installed lithium shipments. The button-cell case is narrower and, when the conditions are met, considerably lighter on paperwork.
Installed vs. Loose: Why Does the Packing Instruction Change?#
Whether the cell is physically installed in the device, not merely packed in the same box, decides which packing instruction applies and how much labeling relief is available. A cell installed in the device at the time of shipment falls under IATA DGR Packing Instruction 970 Section II. A cell packed alongside, but not installed in, the equipment falls under Packing Instruction 969 Section II instead.
Both sections still waive the Shipper's Declaration, but the lithium battery mark is treated differently. Under Packing Instruction 970 Section II, the mark is waived entirely for packages containing only button cells installed in equipment. Under Packing Instruction 969 Section II, the mark is waived only up to four cells per package and two packages per consignment; beyond that threshold, the mark is required even though the declaration is still excepted.
Key points:
(a) Confirm the cell is genuinely installed in the device, not loose in the retail packaging, before selecting Packing Instruction 970 Section II over 969 Section II. (b) Confirm the device carries a functioning accidental-activation safeguard and that the cell has a UN 38.3 test summary on file from the manufacturer. (c) Confirm Japan's domestic layer separately: Fire Services Act (消防法) hazardous-materials thresholds are not reached by retail coin-cell quantities, and the Electrical Appliances and Materials Safety Act (電気用品安全法, PSE Act) covers lithium-ion rechargeable batteries, so a primary, non-rechargeable lithium coin cell sits outside its scope.
Does Japan Add Any Domestic Requirements on Top of IATA and IMDG?#
For a retail-scale shipment of button cell batteries, Japan's domestic rules do not add a separate declaration burden in most cases, but they are a distinct layer from the transport exception and need to be checked separately rather than assumed. The Fire Services Act (消防法) sets quantity thresholds for hazardous materials (危険物) storage and handling; the lithium content in a handful of coin cells in a consumer product shipment does not reach those thresholds.
The Electrical Appliances and Materials Safety Act (電気用品安全法, PSE Act) is the other domestic regime worth ruling out explicitly. Its lithium-ion provision is written around リチウムイオン蓄電池 (lithium-ion storage batteries), meaning rechargeable chemistry, with a per-cell energy density threshold. A primary lithium coin cell is a different chemistry and a different product category under that Act, so it generates no PSE registration or marking obligation on its own. That is the mirror image of the rechargeable case covered in our note on PSE and e-bike batteries, where the rechargeable, higher energy density cell is the one that falls inside PSE scope.
Treat a forwarder or vendor's assurance that "coin cells are not dangerous goods" as a claim to verify, not a settled fact. The cells are excepted under defined conditions, not unregulated outright, and the conditions are specific enough that a generic assurance is not the same as a documented check.
What Documentation Should You Still Keep on File?#
Even where the Shipper's Declaration is excepted, the exception is conditional, so the paper trail that proves the conditions were met is still the shipper's responsibility to hold. At minimum, that means the UN 38.3 test summary from the cell manufacturer, confirmation that the cell is installed rather than loose, and confirmation that the device's accidental-activation safeguard is present and functional.
Keeping that file is also what distinguishes an excepted shipment from a non-compliant one if a carrier or Japan Customs ever asks for substantiation. Our earlier piece on who signs a Japan dangerous goods Shipper's Declaration covers how signatory liability attaches even on shipments that do carry a formal DGD; the same discipline, of not signing or shipping on an unverified assumption, applies here even though no declaration is being filed. Where a product combines an excepted battery with other chemical components, a localized Safety Data Sheet is still a separate requirement; see why a translated SDS isn't enough for Japan for that distinction.
Where the shipment also raises a customs structuring question, such as who is named on the import declaration, that sits alongside the dangerous goods assessment rather than inside it; see our overview of the Attorney for Customs Procedures (ACP) structure for how that role is scoped separately from the transport compliance work covered here.
Frequently Asked Questions#
Does every product with a coin cell battery need a dangerous goods declaration to ship to Japan?
No. If the cell is a lithium coin or button cell installed in the equipment, meets the UN 38.3 test requirement, and the equipment has a functioning accidental-activation safeguard, both IATA DGR Packing Instruction 970 Section II (air) and IMDG Code Special Provision 188 (sea) except the shipment from the Shipper's Declaration, UN-specification packaging and Class 9 labeling. The exception depends on meeting those conditions, not on the product category alone.
What is the difference between Packing Instruction 970 and Packing Instruction 969 for lithium coin cells?
Packing Instruction 970 Section II applies when the cell is installed in the equipment at the time of shipment. Packing Instruction 969 Section II applies when the cell is packed with, but not installed in, the equipment. Both waive the Shipper's Declaration, but 969 only waives the lithium battery mark up to four cells per package and two packages per consignment, while 970 waives the mark entirely for button cells installed in equipment.
Does a lithium coin cell trigger PSE registration in Japan?
No. The Electrical Appliances and Materials Safety Act (電気用品安全法, PSE Act) lithium provision is written around rechargeable lithium-ion storage batteries, not primary (non-rechargeable) lithium metal cells. A CR2032 or similar coin cell is a different chemistry and falls outside that Act's scope, though the underlying consumer product itself may still carry separate PSE obligations depending on what it is.
Conclusion#
The Small-Cell Exception removes the heaviest dangerous goods paperwork for lithium coin cells installed in consumer equipment, but it is a conditional exception, not a blanket exemption. The shipper still needs the UN 38.3 test summary, confirmation the cell is installed rather than loose, and a working accidental-activation safeguard on file before relying on Packing Instruction 970 Section II or IMDG Special Provision 188.
This article is informational only and does not constitute legal, tax, or regulatory advice. Consult a qualified advisor before acting on the content. Last updated: October 2026.