This rugged steel battery holder is designed to accommodate two cells, suitable for NiCd, alkaline, NiMH, carbon, zinc, and lithium batteries. It features nickel-plated brass contacts and is moisture-proof with resin-impregnated materials. The holder maintains batteries under constant spring tension for low contact resistance and includes retainer clips to secure batteries and prevent shifting or loosening. Ideal for applications involving shock or severe vibration, such as power management, commercial, defense, military, and aerospace sectors.