4 AAA battery pack with wires, lid, and mounting holes

Product Name: 4 AAA (7) Battery Holder (with Wires, Cover, and Mounting Holes)

Appearance and Structural Features:
Overall Structure: This is a compact black square battery holder designed specifically for holding four AAA (7) batteries. It features a two-by-two layout, making the overall shape nearly square, which greatly optimizes the use of flat space and is ideal for installation in flat or space-constrained devices.

Materials and Manufacturing:
Shell: The main body is made of black PP (polypropylene) resin material, which offers good insulation and chemical resistance.
Contacts: Internally, there are high-elasticity nickel-plated spiral springs (negative) and metal tabs (positive) 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 directly led out from the side (red wire for positive, black wire for negative). According to the drawing specifications, the wire is UL1007 26# with a length of approximately 150mm (15cm). The ends are stripped and tinned for 5mm, making it easy to solder directly or connect to terminals.
Protective Cover: Equipped with a black sliding or snap-on protective cover (the drawing shows both sides of the cover), which effectively prevents dust from entering and secures the batteries.
Mounting Holes: The battery holder's partitions and edges have round screw mounting holes (the drawing specifies hole diameters of Φ2.5mm and Φ5mm), making it easy to firmly fix the holder to the device's bottom plate.
Polarity Indication: Each battery slot is clearly marked with "1.5V", "AAA", and positive/negative polarity symbols to prevent incorrect battery installation.

Dimension Specifications (Based on Drawing):
Length: Approximately 50.95mm
Width: Approximately 47.55mm
Height: Approximately 11.8mm
This is a very compact square footprint, perfect for flat devices with strict length-to-width ratio requirements.

Electrical Characteristics: Internally, it's designed as a series circuit, and four AA batteries can provide a DC output voltage of 6V.