BASIC INFO—Voltage: 3V; Capacity: 850mAh; Weight: approximate 13g; Diameter: 15.5mm, Height: 27mm. Attention: Do not charge! CERTIFICATIONS—More than 400 EEMB battery models are UL certified. Search "MH20555" on UL for all EEMB UL certification information. BULK PURCHASE AND SAVINGS—Direct from manufacturer with local technical support in California. We provide you with the best value at a reasonable price. The more you buy, the more you save! LONG LASTING - EEMB CR2 3V one-time-use batteries have high energy density that will last 3-5 times longer than alkaline one-time-use batteries when using in high drain devices. These are non-rechargeable/one-time-use/disposable batteries, please DO NOT CHARGE. WIDELY USE—CR2 lithium battery can be used for Nest Temperature Sensor, Fujifilm Instax Mini, flashlight, digital camera(NOT for Arlo cameras), Camcorder, Toys, medical equipment GPS equipment, Intelligent Instrumentation, Electric Meter, Electric Toy, Calculator, Smoke Detector, Electronic Doorbell, MP3. Replaces--CR2, CR15H270, CR17355, 5046LC, DLCR2, EL1CR2, KCR2, and RLCR2-2. EEMB CR2 Battery 4-Pack CR2 3V Lithium Battery 3 Volt CR15h270 Non-Rechargeable Batteries for Fujifilm Instax Mini, Rangefinder, Flashlights, Smoke Detector, Nest Temperature Sensor