Features:1.Positive material: Manganese dioxide2.Negative material: Lithium metal3.Voltage Rated : 3V4.Capacity: 150mAh5.Weight: 2.8g6.Perform temperature: -20 --60 degree7.It can be used to Watch/Laser Pointer/computer/mp3/remote control/camera/toy，and other electronic productsPackage Included:20 x batteryWARNING:Please keep out of reach of children.