The 5x6 18650 Battery Spacer Holder is built to securely hold 30 pieces of 18650 lithium-ion cells in a 5-row by 6-column arrangement. Made from high-quality, flame-retardant ABS plastic, it offers a precise 18.5 mm bore fit for each cell, ensuring stability, insulation, and safe assembly. Its design promotes airflow for effective heat dissipation and prevents short circuits, making it ideal for high-capacity battery packs in e-bikes, solar energy systems, and other power storage projects.