Highlights It's made in Japan. It can be used in watch, calculator, some remote controls & other microamps level battery applications. Choose the right model of your applications & you will feel good service. Do not recharge or dispose of in fire. Keep in a dry & cool place. Specifications Weight Approx:0.4g/pc Size Approx:6.8x 6.8x 2.6mm/pc Model:377/AG4/SR626SWVoltage: 1.55 V Service life:5 years