4 cell 21700 lithium battery holder SMT surface mount type

Product Name: 4-cell 21700 Lithium Battery Holder (SMT Surface Mount Type)

Appearance and Structural Features:
Overall Structure: This is a black four-cell battery holder designed specifically for accommodating four cylindrical lithium batteries of the 21700 size (diameter 21mm, length 70mm). It features a four-row parallel open-frame structure with reinforced partitions between the slots, resulting in a flat rectangular shape ideal for high-density layout on PCBs.

Materials and Manufacturing Process:
Shell: The main body is made of black heat-resistant nylon material (specification: Heat Resistance Nylon 25% G/F or Equivalent, Black Color), offering excellent mechanical strength and insulation properties.
Contacts: Each slot is equipped with 0.3mm thick spring steel contacts on both ends, nickel-plated for good elasticity and oxidation resistance, ensuring reliable contact even in vibrating environments.

Functional Design (Key Features):
SMT/THM Compatible Terminals: Flat metal surface mount terminals (with positioning holes) extend from both sides of the housing, supporting both SMT and THM soldering processes for integration into automated production lines.
PCB Layout Compatibility: Detailed PCB Layout dimensions are provided in the drawings (e.g., spacing 68.00mm, 71.00mm, Φ4.00 positioning holes), making it easy for engineers to design the circuit board directly.
Mounting Holes: Positioning/reinforcement holes (Φ1.50, etc.) are reserved on the partitions for production alignment or additional fixation.
Polarity Indication: The housing is marked with "SMT/THM FOR 21700X4" and embossed positive and negative polarity indicators to prevent incorrect installation.

Dimension Specifications (Based on Drawings):
Body Length: Approximately 82.5mm
Width: Approximately 94.2mm (specification 92.80±0.50mm)
Height: Approximately 15.6mm
Total Length (including terminals): Approximately 92.6mm

Electrical and Environmental Characteristics:
Temperature Resistance: Thermal distortion temperature range from -40°C to 235°C (1.80Mpa), capable of withstanding high temperatures during lead-free reflow soldering.
Flammability: Meets UL94V-0 flame retardant rating.
Environmental Compliance: Complies with RoHS standards.