Features: Unleashes of 21700 batteries with Energy Storage Kit, for power configurations supporting 1S8P, 2S4P, 4S2P, and 8S1P arrangements. from PC+ABS with copper busbars, this battery holder case ensures current support and stability for energy storage projects for soldering. for electronics enthusiasts with foundational understanding of battery series and connections, for those who enjoy assembly and customization. Transform 21700 batteries into power source for UPS systems, portable charging, or energy storage units, with the ease of splicing together multiple brackets for expanded capacity. Our 8 slots not only simplifies the organization of batteries but also enhances the safetys and efficiency of power, making component for any energy storage. Specifications: Materials: Plastic+Copper Package Includes: 1Set Battery Storage Kit note: Due to the screen setting difference, the item color may slightly differents from the pictures. Please allow slight dimension difference due to differents manual measurement.