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3v Lithium Cr2 Batteries - Long Lasting PowerCr2 3 Volt High Power Lithium Battery Is Designed for Use in a Variety of Compatible Devices Like Wireless Security Systems, Home Automation, Photography and Lighting Equipment, and MorePower for a Wide Range of Devices: the Cr2 3 Volt High Power Lithium Battery Is Designed for Use in a Variety of Compatible Devices Like Wireless Security Systems, Home Automation, Photography and Lighting Equipment, and MoreBuilt for Reliable Performance in a Wide Range of High-Powered Devices, the Cr2 Is Equivalent to 3v Cr17335, Dlcr2 and Elcr2 Battery Types and Available in 1, 2,3, 4, 5, and 10 PacksLong-Lasting Power: High Power Cr2 Lithium Batteries Were Also Developed to Provide Reliable Performance for Essential Devices Like Compatible Smoke Detectors and Fire Alarms