High Energy & Continuous Voltage Supply * Long shelf Life, Ideal Temperature Resistance * Superior Storage capacity * Maxell durability and engineering * Expiration Date 2017 The coin-type lithium manganese dioxide battery (CR battery) is a small, lightweight battery with an operating voltage of 3V and the ability to operate over a wide temperature range. It has a wide range of applications, both for powering devices such as wristwatches and electronic calculators and can be used in all types of electronic devices mainly as memory and RTC backup.
These batteries are not high quality. They are CHEAP all right but they don't last long. I use them for my electronic dictionary and if energizer batteries bought in Walgreens generally lasted for 2 months these ones died in 3 weeks or so.