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Lithium battery materials

  • 21700 cylinder cell cases
21700 cylinder cell cases

21700 cylinder cell cases

  • Product Origin:China
  • Lead Time:5-12 days
  • Payment:T/T,Visa, WesternUnion, Paypal, MoneyGram
  • Product description: This is a Cylindrical battery case with anti-explosive cap and insulation O-ring,used for 21700.


This is a Cylindrical Battery Case with Anti-Explosive Cap and Insulation O-ring.Used for cylindrical battery research, producing, especially for Powerful cylindrical battery making. The shell of cylindrical lithium batteries is mainly a kind of safety protection product for protecting lithium batteries, which can achieve explosion-proof, corrosion-resistant, safety and other characteristics.

Technical Specifications


21700 cylinder cell cases

Item code


Dimensions (Dia x Height)

Case Dimensions: 21.09mm(OD) x 21.52mm(ID) x 73.74mm(H); 

Top Cap with O ring : 20.95mm(D) x 4.2mm(H);

18650 and 38120 Cylinder Cell Cases can be supplied;

Material of 304ss and 316ss can be supplied.


Case are made of 304 stainless steel

Cap are made of Nickel plated steel

Seal O-ring are made of nylon(Optional)

Insulating gasket are made of PP 


100 pcs