Lithium button cells are commonly used in car security, organizer (backup battery for PDA ), camera, electric thermometer, calculator, computer equipment (CMOS memory backup battery ), toys, communication equipment, electronic watches / clocks, card radios, data pack for video camera. Here are Sunmol Lithium coin button cells with high quality and long life. And also it has the advantage of leakage proof. Model:CR2450,CR2430,CR2330,CR2320,CR2032,CR2025,CR2016,CR1620,CR1616,CR1225,CR1220,CR1216 etc. For more detailed information, pls contact with sunmol or you are welcome to view www.sunmol.com