HTS 8506.30.10Primary cells and primary batteries; parts thereof:Mercuric oxide: Having an external volume not exceeding 300 cm3

What that translates to:Mercuric oxide primary batteries, 300 cm³ or less

Also written 85063010 or 8506.30.1000. Rates as CBP is collecting them today. Updated Oct 1, 2026.

Country of origin

Mercuric oxide primary batteries, 300 cm³ or less (HTS 8506.30.10) from China owe 40.2% in total duties as of Oct 1, 2026: a 2.7% regular duty plus a 12.5% forced-labor tariff (Section 301) and a 25% China tariff (Section 301).

Total duty rate40.2%That's $4,020 on a $10,000 shipment.

Forced-labor tariffSection 301, since Jul 24, 202612.5%

China tariffSection 301, since May 10, 201925%

Regular dutyBase rate (MFN) in the tariff schedule2.7%

Total duty40.2%

Court status: Challenged at the U.S. Court of International Trade in In re Section 301 Forced Labor Cases, Court No. 26-03555-3JP, before a three-judge panel. The plaintiffs, Learning Resources and others, have moved for judgment on the agency record, arguing that the action (91 FR 47318) exceeds USTR's statutory authority, is arbitrary and capricious, and is pretextual; 25 states, plaintiffs in Court No. 26-cv-03467-3JP, support them as amici (brief filed Sep 11, 2026). No ruling as of Oct 1, 2026, so the rate is unchanged.

Sources: USITC Harmonized Tariff Schedule, Revision 20 (2026); USTR, Notice of Actions in Section 301 Investigations (forced labor), 91 FR 47318, Jul 28, 2026; HTS 9903.05.31; USTR, Notice of Modification of Section 301 Action (List 3 raised to 25% from May 10, 2019), 84 FR 20459, May 9, 2019; HTS 9903.88.03.

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Official description

Primary cells and primary batteries; parts thereof: Mercuric oxide: Having an external volume not exceeding 300 cm3

Legal text from the Harmonized Tariff Schedule, Revision 20 (2026), chapter 85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles.

Statistical lines

The 10-digit numbers used on entry paperwork. They share this code's duty rates.

8506.30.1000 (8506301000)Having an external volume not exceeding 300 cm3 · reported in No.

What changed for this code

Jul 24, 2026Forced-labor tariffs start on imports from 60 economies (Section 301)
Jul 22, 202625% Section 301 tariff on products of Brazil starts
Jan 1, 2026Section 301 tariff on Nicaragua starts at 0%, set to rise to 10% in 2027 and 15% in 2028

Questions about HTS 8506.30.10

What is the duty rate for HTS 8506.30.10?

The regular (column 1 general) rate printed in the tariff schedule is 2.7%. Goods from China owe 40.2% in total as of Oct 1, 2026, including any additional tariffs. Additional tariffs depend on the country of origin; choose one above to see its full rate.

Is HTS 8506.30.10 subject to Section 301 tariffs?

Yes, for goods from 85 countries and territories as of Oct 1, 2026, including Algeria, Angola, Argentina, Australia, Austria. Choose a country above to see the rate and any exemptions.

Is HTS 8506.30.10 subject to Section 232 tariffs?

No Section 232 tariff applies to HTS 8506.30.10 as of Oct 1, 2026, from any country of origin.

HTSLookup shows the duties CBP collects on this code by country of origin. Antidumping or countervailing duties may also apply to some exporters; they're set per company and aren't shown.