12 x DURACELL 3V LITHIUM CR2 Ultra Photo Batteries DLCR2 6 x 2 packs
ALSO KNOWN AS:DLCR2, CR2, ELCR2, KCR2. The Duracell Ultra M3 CR2 Lithium battery is probably the best performing lithium photo battery available. This high performance CR2 battery from Duracell is a great battery at a great price.