Powers devices such as watches, calculators, sporting goods, games, medical devices, and more Long-lasting, reliable battery life; performs in extreme temperatures Engraved with battery model for easy identification Ideal for vernier callipers Laser Pointer, Hearing Aids, Insulin Pumps, Heart Rate, Monitor, Watches, Cameras, Calculators, Car Security Alarm, Keyless Car Remotes, Organizers, Glucometer, Computer Equipment (memory backup battery) CMOS, Toys, Communication Equipment, data pack for video cameras, and other devices that requires this battery size!