1 pack of 18650 lithium battery cells with wires, open type

Product Name: 18650 Battery Holder (with Wires, Open Type)

Appearance and Structural Features:
Overall Structure: This is a slender black single-cell battery holder designed specifically for accommodating a 18650 cylindrical lithium battery (diameter 18mm, length 65mm). It features a single-cell direct-insert layout, making it a narrow and elongated shape that fits easily into tight spaces.

Materials and Manufacturing:
Shell: The main body is made of black PP (polypropylene) resin material (specification: Base Material: PP Resin, Black). It offers good insulation, chemical resistance, and some flame retardancy (UL94-HB).
Contacts: One end features a highly elastic nickel-plated spiral spring (negative terminal), while the other end has a metal spring/connector (positive terminal) to ensure secure battery contact. The rivets are made of nickel-plated brass for excellent electrical conductivity.

Functional Design (Key Features):
Wired Output: Red and black wires are led out from the side (red wire for positive, black wire for negative). According to the specifications, the wire is UL1007 26# AWG, approximately 150mm (15cm) long, with 5mm of tinned and stripped ends for easy soldering or terminal connection.
Mounting Hole: There's a round screw mounting hole in the middle partition of the battery holder (specification: Hole diameter Φ3.3mm) to securely fasten the holder to the device's bottom plate.
Polarity Marking: The positive and negative terminals are clearly marked with ⊕ / ⊖ symbols inside the slot to prevent incorrect battery installation.
Open Design: It's an open-frame structure and typically needs to be used in conjunction with a device's enclosure for protection and battery fixation.

Dimension Specifications (Based on Drawings):
Total Length: Approximately 76mm
Width: Approximately 21.6mm
Height: Approximately 18.4mm

This is a very compact design, perfect for small devices with limited space.

Electrical Characteristics: A typical 18650 lithium battery has a nominal voltage of 3.7V (about 4.2V when fully charged) and a capacity generally ranging from 2000–3500mAh, making it suitable for applications requiring moderate to high discharge rates.