2-cell 18650 lithium battery holder pins/wire soldered version

Product Name: 2-cell 18650 Battery Holder (Pin/Welding Type)

Appearance and Structural Features:
Overall Structure: This is a black dual-slot battery holder designed specifically for accommodating two 18650 cylindrical lithium batteries (diameter 18mm, length 65mm). It features a dual-row parallel open-frame structure, with a reinforced partition separating the two slots, resulting in a flat rectangular shape.

Materials and Manufacturing:
Shell: The main body is made of black high-temperature resistant engineering plastic (usually ABS or PC), which offers good insulation and mechanical strength. The surface is matte for a durable feel.
Contacts: Each slot is equipped with nickel-plated metal spring contacts at both ends. One end has a flat metal cap (positive), and the other end has a spring structure (negative), ensuring reliable contact even in vibrating environments.

Functional Design (Key Features):
Parallel Design (PARALLEL): The bottom of the shell clearly displays the word "PARALLEL" and battery parallel symbols (⊕ ⊖), indicating that the internal circuit of the battery holder has connected the two slots in parallel. This means the output voltage remains the same as that of a single battery (about 3.7V-4.2V), but the capacity doubles.
Polarity Indication: The bottom of each slot has clear positive and negative embossed symbols (+ / -) along with a battery icon to prevent incorrect polarity during installation.
Wiring Options: Side or end of the holder provides wire outlets or solder pads (the image shows an open side, typically used for connecting red and black wires or welding pins), making it easy to connect to external circuits.
Mounting Holes: Screw mounting holes are provided on both sides and the bottom of the shell, allowing the battery holder to be securely fixed to a device's casing or baseplate.

Dimension Specifications (Based on Drawings):
Total Length: Approximately 78mm
Total Width: Approximately 40mm
Total Height: Approximately 21mm

Electrical Characteristics:
Compatible Batteries: Standard 18650 lithium batteries (can also accommodate shorter batteries like 18500, 18350, etc., but check the spring travel).
Connection Method: Parallel.
Output Voltage: 3.7V (nominal) / 4.2V (fully charged).
Output Capacity: Single cell capacity × 2 (e.g., two 2000mAh batteries in parallel result in a total capacity of 4000mAh).