Two (2) CR1620 Battery in new Child-Safe Retail Consumer Packaging, by Premium Batteries Authentic premium battery brands, the Japanese and European batteries we source are produced by the highest quality manufacturers of coin cell batteries in the world, providing the reference standard for quality. These batteries offer significant advantages such as are extended shelf life, good low-temperature operation, high operating voltage, excellent leakage resistance, and reliable capacity performance. PREMIUM BATTERIES is a private label brand using only world-class branded button and coin cell batteries from leading manufacturers. Only the highest grade of Japanese or European brands are used in our private label packaging. We use high-quality packaging materials to insure this package is Child-Safe. Packaged in U.S.A., Premium lithium coin cell brands offer significant advantages over cheaper Chinese or generic brands. Used in diverse product applications: audio equipment, calculators, cameras, light meters, data acquisition systems, electronic communication devices, electronic games, electronic wristwatches clocks, hearing aids, industrial monitors/controls, medical equipment, memory backup, microcassette recorders, nurse call systems, remote keyless entry (Key FOB), security devices, transceivers, radios, remote controls, motherboards and more. For keyless entry remotes, Panasonic products are trusted to perform very reliably.