Three AA waterproof battery packs with timer function/8-function battery pack with PCB circuit board

Product Name: Waterproof Battery Holder for 3 AA (Size 5) Batteries (with Timer Function, Multi-Mode Control)

Appearance and Structural Features:
Overall Structure: This is a sturdy, durable black rectangular battery holder designed specifically for holding three AA (Size 5) batteries. Its most notable feature is its fully sealed waterproof design, with strong snap locks around the edges to ensure the battery compartment remains sealed in harsh environments.

Materials and Manufacturing:
Shell: The main body is made of high-strength engineering plastic with a smooth surface. The picture shows two color options: the classic black version and the transparent white version (the transparent version makes it easy to check the battery level inside).
Sealing Design: There is a sealing groove between the lid and the base (usually used with a rubber gasket), combined with the locks around the edges, effectively preventing moisture and dust from entering.

Functional Design (Key Features):
Integrated Control Button: There is a round rubber button on the top, which feels comfortable to press and helps with waterproofing.
Multi-Mode Control: The lid clearly displays English instructions for 9 lighting modes, including:
Combination
In wave
Sequential
Slo glo
Chasing/Flash
Slow fade
Twinkle/Flash
Steady on
Off

Timer Function: Although the word "Timer" is not directly printed on the surface, waterproof holders with complex mode control like this usually have a built-in timer chip (such as a common 6-hour auto-on/18-hour auto-off cycle), making them suitable for outdoor decorative lights.

Dimensions:
Length: 79mm
Width: 67mm
Height: 22mm

Electrical Characteristics: The internal circuit is designed for series connection, and three AA batteries can provide a DC output voltage of 4.5V.