... Utility meters ( electricity meters, water meters, gas meters, AMR)Security systems ( door lockers, smoke alarm sensors detectors)CMOS memory and ... RTC backupVehicle tracking , Industrial clocksSea buoys, remote monitoring systems, industrial clocks,Military electronics and so on. 3.6V ... , alarms and security devices, memory back-up, tracking Systems, SART and EPIRB devices and many othersThis size D ...