2 cell 21700 lithium battery holder SMT surface mount type

Appearance and Structural Features:
Overall Structure: This is a black dual-cell battery holder designed specifically for accommodating two 21700 cylindrical lithium batteries (diameter 21mm, length 70mm). It features a dual-row parallel open-frame structure, with a reinforced partition separating the two slots. The overall shape is a flat rectangle, making it easy 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), which offers high mechanical strength and good insulation.
Contacts: Both ends are equipped with 0.3mm thick spring steel contacts, nickel-plated on the surface (0.3mm Spring Steel Temper, Nickel Plated). These contacts have good elasticity and oxidation resistance, ensuring reliable contact of the batteries in vibrating environments.

Functional Design (Key Features):
SMT/THM Dual-Compatible Terminals: Flat metal surface mount terminals (with positioning holes) extend from both sides of the housing. They can be used for surface mount (SMT) or through-hole (THM) soldering, accommodating different production line processes.
PCB Layout Compatibility: Detailed PCB Layout dimensions are provided in the drawings (e.g., spacing of 34.00mm, 38.00mm, 46.30mm, etc., and Φ4.00 positioning holes), making it easy for engineers to design the circuit board directly.
Mounting Holes: Positioning/reinforcement holes (e.g., Φ1.50) are reserved on the middle partition plate, which can be used for production positioning or additional fixation.
Polarity Marking: The housing is printed with "SMT/THM FOR 21700X2" and embossed positive and negative polarity markings to prevent incorrect installation.

Dimension Specifications (Based on Drawing Markings):
Body Length: Approximately 82.5mm
Width: Approximately 47.7mm
Height: Approximately 15.6mm
Additional key dimensions specified in the drawings: Total length 92.60mm, slot width 48.00±0.50mm, height 15.65±0.20mm

Electrical and Environmental Characteristics:
Temperature Resistance: Thermal deformation temperature ranges 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.