The Keystone 2173 is a robust steel battery holder engineered for demanding environments, including commercial and military applications. Its design incorporates constant spring tension to ensure low contact resistance, crucial for reliable power delivery. The holder is compatible with a wide range of battery chemistries, such as NiCd, Alkaline, NiMH, Carbon, Zinc, and Lithium cells. Features include corrosion-resistant nickel plating, brass contacts, and moisture-proof resin-impregnated fiber insulating washers. Keystone offers customization options for holders with more than four batteries or variations from standard designs, providing tailored solutions for specific requirements. Available with PC and Quick-Fit terminals upon special order.