Features: This AA battery holder provides stable 3V power output with double AA batteries in series, featuring nickel plated copper contacts for conductivity and compatibility with alkaline, NiMH, or rechargeable batteries, ideal for low power devices like sensors and remote controls. Constructed from ABS plastic with a cover design, it includes a built in toggle switches for power control, and offer multiple installation option. Designed for electronics hobbyists, developers, and manufacturers working on small scale projects or mass produced equipment, it caters to users seeking efficient, space saving power solution for embedded applications. Perfect for scenarios like integrating into sensors networks, LED lighting systems, microcontroller boards, or remote control units where embedded power is essential for minimizing standby power consumption and extending device service life. Enhanced with safety features such as polarity markings to prevent circuit damage, an impacts resistant and flame retardant casing, and spring contacts, this embedded battery case ensures long term durability and high cost efficiency in bulk packs. Specifications: Component: ABS Color: Black Size: about. 8.4x2x4.5cm/3.3x1.18x1.77in Package Includes: Battery Holder note: Case ONLY, battery NOT include. Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.