Features: Experience easy installation with our 18650 battery holder, to lower the threshold and make electronic projects accessible for everyone. From PC+ABS materials, this battery holder offers excellent durability and small size designing, ensuring long time use without deformation. For electronics enthusiasts, students, and engineers reliabled power connection for their creative projects and experiments. Perfectly for various applications such as home electronics, robot assembly, LED lighting modifications, and scientific experiments, providing stable power support. Enhances your electronic projects with this versatiled battery holder, featuring a built in spring structure for improved battery contacts stability and extended service. Specifications: Item: Battery Box For 18650 Battery Holder Materials:PC+ABS Size：about 78x20x20mm/3.07x0.79x0.79in ; 78x40x20mm/3.07x1.57x0.79in; 78x60x20mm/3.07x2.36x0.79in ; 78x80x20mm/3.07x3.15x0.79in Package Type： For 1/2/3/4 Slots Optional Package Includes: 1PC Battery Box（Optional Slots） note: Due to the problem of lighting effect there might be tolerances in product, please understand. Please allow 0-2mm error due to manual measurement.