The Exell MRB675 1.35v Zinc Air Battery (Z675PX PX675 MR44 EPX675) provides efficient and long-lasting performance. This battery also functions as a replacement cell for many common and unique applications. Ranging from vintage cameras to complex medical testing equipment, the MRB675 battery will meet the needs of all consumers. The Exell MRB675 1.35v Zinc Air Battery (Z675PX PX675 MR44 EPX675) is an ideal replacement for the MR44, PX76, and PX675 batteries that are discontinued because of their toxicity and environmental concerns.