The 2x6 18650 Battery Spacer Holder is designed to securely hold 12 pieces of 18650 lithium-ion cells in a 2-row by 6-column arrangement. Built from durable, flame-retardant ABS plastic, it provides a snug 18.5 mm bore fit, ensuring battery stability, insulation, and safety. The structure prevents short circuits and allows proper airflow for heat dissipation, making it ideal for assembling large-capacity battery packs for e-bikes, solar storage, and other power projects.