Features: Unleashes the potential of 21700 batteries with Energy Storage Kit, for creating power pack for soldering. from PC+ABS plastic, this battery holder case features copper busbars for current support to accommodate various configurations like 1S8P, 2S4P, 4S2P, and 8S1P. for electronics enthusiasts with solid understanding of battery series and connections, this kit for those to enhances their projects. Whether building backup power supply, a portable energy source, or efficient storage systems, this splicable battery case is component for power management. The ensures easy assembly and scalability, allowing you to expand your energy storage capacity as need while ensuring safety and stability in applications. Specifications: Materials: Plastic+Copper Size:73x52mm Package Includes: 1Set Battery Storage Kit note: Please allow 1-3mm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.