SR521SW Coin Cell Battery
Ultra-thin SR521SW silver oxide coin cells (5.8mm x 2.1mm) power micro-electronics with <300 cm³ volume. Classified HTS 8506.40.1010 as primary button/coin silver oxide batteries. Ideal for glucose meters and hearing aids.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If zinc-air or other button chemistries
Only silver oxide button cells get 8506.40; zinc-air hearing aid cells have separate provisions.
If pre-assembled into medical instruments
Integral batteries in medical devices follow instrument HTS, not standalone battery classification.
If high silver content imitation jewelry cells
Silver oxide with decorative value may get jewelry classification over battery heading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Maintain temperature logs during shipping (<60°C) to preserve silver oxide electrolyte stability
• Use original manufacturer packaging to preserve anti-corrosion seals required for duty-free small package entries
• Separate declaration for silver content if exceeding de minimis for precious metal duties
Related Products under HTS 8506.40.10.10
SR44 Silver Oxide Button Cell Battery
The SR44 is a small silver oxide button cell battery with an external volume under 300 cm³, commonly used in watches and calculators. It falls under HTS 8506.40.1010 as a primary silver oxide button/coin cell battery not designed for recharge. Provides stable voltage output of 1.55V for low-drain devices.
SR626SW Silver Oxide Coin Cell Battery
SR626SW coin cells are silver oxide primary batteries (≤300 cm³) used in small electronics like hearing aids and toys. Classified under HTS 8506.40.1010 for button/coin configuration and silver oxide chemistry. Offers high energy density and 3+ year shelf life.
377 Silver Oxide Watch Battery
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.
SR41 Silver Oxide Button Cell
SR41 button cells (7.9mm x 3.6mm) are silver oxide primary batteries for precision devices, volume well under 300 cm³. HTS 8506.40.1010 applies to these flat coin-style non-rechargeable cells. Used in medical timers and photo meters.
AG13 Silver Oxide Calculator Battery
AG13/LR44 equivalent silver oxide button cells for calculators and remotes, volume ≤300 cm³. HTS 8506.40.1010 covers these primary non-rechargeable coin batteries. Provides 1.55V with 10-year shelf life.