377 Silver Oxide Watch Battery from China
The 377 (SR626/377) silver oxide button battery powers quartz watches and instruments, with volume under 300 cm³. HTS 8506.40.1010 covers these primary non-rechargeable coin cells using silver oxide electrolyte. Known for low self-discharge and stable performance.
Duty Rate — China → United States
37.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Import Tips
• Include certificates of analysis showing silver content >28% of cathode material per tariff definition
• Segregate from lithium batteries during transport; silver oxide cells have different UN numbers (UN3090 vs UN3480)
• Watch for anti-dumping duties on certain Asian silver oxide cells; check Commerce Department scopes