Also known as: PR41, AC312E, V312A, DA312X, NHS ref CP41, ZA312, PR312L, DA312, 312AP, EP312E, 312AE. Price per dial pack containing 6 cells. Uniquely designed with a newly enhanced formula, Zinc Air batteries are suitable & reliable for sensitive & finely assembled electronic items such as the many different styles of hearing aids. They hold a stable operating voltage throughout use & perform well over a wide range of temperatures.