Boost Battery Safety & Assembly Efficiency with Our 21700 Pre-Nickel-Plated Steel Housing Set — The ultimate all-in-one solution for 21700 lithium-ion battery packaging, trusted by manufacturers worldwide for energy storage, power tools, and electric mobility.

• Model: 21700 Cylindrical Battery Case Set
• Material: High-quality steel (shell) + premium insulating material (sheets)
• Compatible Cell Size: 21mm (diameter) * 70mm (height)
• Components: 21700 steel shell + explosion-proof cap + upper insulation sheet + lower insulation sheet
• Application: Automated battery assembly, lithium-ion battery packaging for various devices
• Safety Standard: Complies with global lithium-ion battery housing safety regulations

• Pre-Nickel-Plated Steel Durability: Corrosion-resistant pre-nickel-plated steel shell ensures long-term structural stability, even in high-humidity or harsh operating environments—ideal for industrial and consumer battery applications.
• Safety-First Explosion-Proof Cap: Built-in pressure relief mechanism prevents overheating and explosion risks, complying with UN38.3 and IEC 62133 safety standards for lithium-ion batteries.
• Precision Insulation Pads: High-temperature-resistant upper & lower insulation pads eliminate short-circuit risks, enhancing battery electrical stability during charging and discharging cycles.
• Seamless Assembly Compatibility: Standardized 21700 dimensions (21mm * 70mm) perfectly fit automated assembly lines, reducing labor costs and assembly errors for mass production.

Whether you’re scaling up production or launching a new product, our 18650 battery case set provides the reliability and convenience you need. Contact our sales team today to get a competitive quote, discuss customization, or learn more about how we can support your project!