Energizer CR2 lithium batteries contains two new 3V lithium/manganese dioxide (Li/MnO2) cells with an IEC-CR2 chemical system that delivers powerful current. Energizer CR2 cells are suitable for use in high-drain devices such as digital cameras, flash photography units and other small electronic assemblies; photographers can rely on dependable, long-lasting Energizer power including in extremely cold snow or hot desert environments (from minus 40 degrees up to 60 degrees Celsius).