The MN21 is a non-rechargeable battery, designed for use in medical devices like thermometer, glucometer, blood pressure instrument as well as everyday electronics like a calculator, laser pointers, anti-bark spray collars, watches, toys (small toys, children's books) and security alarm transmitters. Voltage: 12V Weight: 7.9g approx Dimensions: 10.6mm x 28.5mm Pack of 2
