3 AA rechargeable square battery packs with lid and switch

Product Name: 3 AA Battery Holder (Enclosed, with Switch)

Appearance and Structural Features:
Overall Design: This is a uniquely designed black (also available in white) square battery holder, specifically designed to hold three AA batteries. It features a side-by-side layout that gives it an almost square shape, making it perfect for embedded installation or use as a device back cover.

Material and Manufacturing: The shell is made of high-quality engineering plastic (usually ABS) with a matte finish, ensuring durability. The edges have wide mounting flanges with countersunk screw holes at each corner for easy and secure attachment to a device panel or casing.

Functional Features (Key Highlights):
Integrated Toggle Switch: A small toggle switch is integrated on one side edge of the battery holder, clearly labeled with "ON" and "OFF" positions. Users can directly control power on/off from the battery holder itself, eliminating the need for an additional switch in the external circuit.

Flip-Top Protective Cover: The top of the battery compartment has a flip-top cover connected by hinges, with a snap-fit design on the edge. When closed, it secures the batteries to prevent them from falling out due to vibration and also provides dust protection. An arrow on the cover indicates the opening direction.

Mounting Holes: The screw holes at the four corners are perfectly designed to fit into pre-cut slots in a device casing, ensuring the battery holder's surface is flush with the device's surface.

Contact System:
Negative Terminal: An internally mounted, highly elastic nickel-plated coil spring ensures tight and flexible battery contact.
Positive Terminal: The other end features metal spring contacts.

Dimensions:
Length: 68.8mm
Width:48.5mm
Height: 18.6mm

Electrical Specifications: Internally designed as a series circuit, three AA batteries provide a DC output voltage of 4.5V.