These batteries are suitable for watches, calculators, cameras, games, lighters, and other small electronic appliances. Wide operating and storage temperature capability ~ Optimum Range: -4F (-20C) to 140F (60C); but in use between -40F (-40C) and 160F (71C). 3.0V CR-927 Lithium Button Cell Batteries. Ideal for applications used in precision engineering tools to power a wide variety of small electronic devices. These batteries will last for relatively long periods. Expect 4 to 5 years in low drain usage and a steady reliable current is ensured. The positive material is made of manganese dioxide which is chemically very stable resulting in the long service life of the battery. The electrolyte used in these Lithium batteries is a unique non-aqueous electrolyte that safeguards against leakage. Their new high energy density design makes them lightweight very compact and powerful. They have been specially developed to perform at their capacity under the extremely wide temperature range of -20C to +60C (-4 to +140 F). The capacity listed is for a constant resistance discharge down to 2.0 volts per cell. Voltage: 3.0v. Recommended Continuous Drain: 0.5mA. Recommended Pulse Drain: 5.0mA. Single Use, Non-Rechargeable. Dimensions: 9.5mm × 2.7mm. Capacity: 30mAH. Weight: .6g. Use Interchangeable with Names/Designations (vary by brand and chemistry): DL927, ECR927, BR927, GR927, DL927B, BR927-1W, CR927-1W, KCR927, LM927, CX927, CX 927. Common Uses: In blinkies, which are also commonly called some combination of the following terms: flash, magnet, strobe, body, blink, light, and/or jewelry. Also commonly used in watches, pagers, calculators, PDA organizers, lights, electronic devices, flashing toys, blood pressure monitors, glucose meters, hearing aids, and glow in the dark jewelry.