Chapter 85 covers 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. This chapter is the most concentrated chapter of technology-intensive products in the HS classification, involving various types of equipment for the production, conversion, storage, and utilization of electrical energy. Storage batteries, as electrical energy storage devices, are classified in this chapter regardless of their chemical system, specifically under heading 8507. Heading 8507 covers electric accumulators (storage batteries), including separators therefor, whether or not rectangular (including square). A storage battery is a device that converts chemical energy into electrical energy through a chemical reaction, is rechargeable, and can be used repeatedly. This heading includes lead-acid accumulators, nickel-cadmium accumulators, nickel-metal hydride accumulators, lithium-ion accumulators, fuel cells, etc. However, it does not include primary cells (8506) or battery chargers (8504). First 2 digits 85: indicates Chapter 85, i.e., electrical machinery and equipment and parts thereof. Digits 3-4, 07: indicates heading 8507, i.e., electric accumulators (including separators). Digits 5-6, 20: indicates subheading 850720, i.e., nickel-cadmium accumulators. Under heading 8507, subheadings are divided by electrode material type: 850710 for lead-acid accumulators, 850720 for nickel-cadmium accumulators, 850730 for nickel-iron accumulators, 850740 for nickel-metal hydride accumulators, 850750 for lithium-ion accumulators, 850760 for lithium-ion accumulators (for power use), and 850780 for other accumulators. Therefore, 850720 specifically refers to nickel-cadmium accumulators. Nickel-cadmium accumulators use nickel hydroxide as the positive electrode, metallic cadmium as the negative electrode, and an alkaline electrolyte, and are rechargeable storage batteries, so they are classified under 8507. Their electrode materials are nickel and cadmium, which distinguishes them from lead-acid (850710), nickel-metal hydride (850740), lithium-ion (850750/850760), etc., so they are classified under 850720. They cannot be classified under 8506 (primary cells) because they are rechargeable; they cannot be classified under 8504 (chargers) because they are the storage battery itself.

Product Name: The standard name of the declared commodity, which should accurately reflect the battery type, such as "nickel-cadmium storage battery." Use: Explain the specific application scenario of the battery, such as for power tools, emergency lighting, communication equipment, etc. Brand: Fill in the brand or manufacturer name of the battery; if there is no brand, indicate "no brand." Model: Fill in the battery's model or specification code, such as AA, AAA, D, etc., or the specific model. Capacity: Indicate the battery's rated capacity in ampere-hours (Ah) or milliampere-hours (mAh). Voltage: Indicate the battery's rated voltage in volts (V), such as 1.2V. Contains Cadmium: Clearly state whether the battery contains cadmium; because nickel-cadmium batteries necessarily contain cadmium, it must be declared truthfully. Appearance Dimensions: Describe the battery's shape and dimensions, such as cylindrical, square, etc., as well as specific dimensions. Product Name: Nickel-cadmium storage battery; Use: For power tools; Brand: XYZ; Model: AA-1200; Capacity: 1200mAh; Voltage: 1.2V; Contains Cadmium: Yes; Appearance Dimensions: Diameter 14mm, height 50mm. Mistakenly classifying nickel-cadmium storage batteries under 850610 (manganese dioxide primary cells) because they look similar but are not rechargeable. Neglecting to declare "whether it contains cadmium," resulting in customs being unable to determine environmental requirements and correct classification. Incorrect capacity unit, such as mistakenly writing mAh as Ah, resulting in inaccurate parameters.

The core basis for classification is the battery's chemical system and rechargeable characteristics. Nickel-cadmium accumulators use nickel hydroxide and metallic cadmium as electrodes and an alkaline electrolyte, can be repeatedly charged and discharged, and are storage batteries. According to General Rules of Interpretation 1 and 6, they should be classified under 8507.20. Attention must be paid to the difference from primary cells (8506): primary cells are not rechargeable, while storage batteries are rechargeable. At the same time, the difference from lithium-ion accumulators (8507.60) lies in the different electrode materials. 850610 Manganese dioxide primary cells: Primary cells are not rechargeable and are single-use; nickel-cadmium accumulators are rechargeable and can be used cyclically. 850710 Lead-acid accumulators: The electrode materials are lead and lead dioxide, and the electrolyte is sulfuric acid; nickel-cadmium accumulators have nickel and cadmium electrodes and an alkaline electrolyte. 850740 Nickel-metal hydride accumulators: The negative electrode is a hydrogen storage alloy and does not contain cadmium; nickel-cadmium accumulators contain cadmium in the negative electrode, and environmental requirements differ. 850750 Lithium-ion accumulators: The electrode materials are lithium metal oxide and graphite, with high voltage and high energy density; nickel-cadmium accumulators have low voltage and a memory effect. 850780 Other accumulators: Subheading 850780 is a residual provision applicable to accumulators not otherwise specified; nickel-cadmium accumulators are specifically named and should be classified under 850720 first. Is the battery rechargeable? Do the electrode materials contain nickel and cadmium? Does it belong to primary cells (8506)? Does it belong to lithium-ion or nickel-metal hydride batteries? Is it specifically named under 850720?

How do I look up the HS code for nickel-cadmium storage batteries? First confirm that the battery is rechargeable and that the electrodes contain nickel and cadmium, then go to HS Chapter 85, find heading 8507 (electric accumulators), and then select subheading 850720 according to the electrode material. It can be verified through customs tariff schedules, HS code query websites, or by consulting a customs broker. What is the difference in HS codes between nickel-cadmium storage batteries and nickel-metal hydride storage batteries? Nickel-cadmium storage batteries are classified under 850720, and nickel-metal hydride storage batteries under 850740. The main difference lies in the negative electrode material: the negative electrode of nickel-cadmium batteries is metallic cadmium, while that of nickel-metal hydride batteries is a hydrogen storage alloy. Electrode material information must be provided during classification. What declaration elements must be provided when declaring nickel-cadmium storage batteries? Product name, use, brand, model, capacity, voltage, whether it contains cadmium, and appearance dimensions must be provided. Among these, "whether it contains cadmium" is key because it involves environmental regulations and accurate classification. What special regulatory conditions are required for the export of nickel-cadmium storage batteries? Because they contain heavy metals such as cadmium, they may be subject to environmental regulations, such as the Basel Convention's control on transboundary movements of waste. Before export, it is necessary to confirm whether a Customs Clearance Form for Outbound Goods or certification from the environmental protection department is required, and to comply with the regulations of the destination country. If nickel-cadmium storage batteries are used for power tools, does the classification change? The classification does not change because of use; they are still classified under 850720. However, the use must be truthfully filled in during declaration to facilitate customs statistics and supervision. If imported together with power tools, they may need to be classified separately. How are parts of nickel-cadmium storage batteries classified? If battery parts (such as separators and housings) are imported separately, they are generally classified under 850790. However, if they are assembled with the battery into a complete article, they are classified as the complete machine. Judgment must be made based on the specific state. How do I determine whether a nickel-cadmium storage battery is a dangerous good? Nickel-cadmium storage batteries contain cadmium and are hazardous substances, and may be classified as dangerous goods during transport (UN 2795, etc.). Packaging and transport requirements must be determined according to international dangerous goods regulations (IMDG, IATA), and they must be declared truthfully. What should be noted when selling nickel-cadmium storage batteries through cross-border e-commerce? It is necessary to ensure that the product complies with the destination country's environmental regulations (such as the EU RoHS Directive restricting cadmium content) and to declare the HS code correctly. Small parcel exports also require complete declaration information to avoid customs clearance delays caused by incorrect classification.