Compatible:Electronic thermometers, calculators, computer equipments, toys, accutrons, communication equipments, electronic watches-clocks, card radios, video cameras, car alarms and keyfob batteries, backup batteries for PDA (e.g. glucometers. Voltage: 3.0 Volts Capacity: 100 mAh (to 2.0 volts) Chemistry: Lithium Coin 1 Year Warranty The Energizer CR2016 battery is a top choice for its reliable performance in devices like heart rate monitors, keyless entry, glucose monitors, toys and games. CR2016 3v battery holds power upto 8 years in storage and performs even in extreme temperatures (-22 to 140 F). Get the 2-pack for your device so you have backup Energizer Cell power, reducing downtime and the need for frequent purchase.