Energizer Lithium Photographic CR2. Also known as: DLCR2, DLCR2B, RLCR2, KCR2, EL1CR2, RLCR2-L, CR-2, 5046LC, duracell cr2. This high-rate 3-volt lithium battery powers your photo equipment and offers very high energy density as well as excellent rate capability.