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The CR2032 Lithium Coin 3v Batteries CR2032, CR2032H, battery is used in a wide variety of devices and applications including computer motherboards, car key fobs, watches, calculators, PDAs, electronic organizers, garage door openers, toys, games, door chimes, pet collars, LED lights, sporting goods, pedometers, calorie counters, stopwatches and medical devices, This wide, thin lithium coin cell is a common power source for computer memory backup power, as well as some calculators and watches. It supplies 3V of output power with typical capacities of 500 - 560mAH, making the 3032 a popular choice for medium-high drain applications.