Keysight M9036A PXIe Embedded Controller User Guide 59
CMOS Battery Backup Service
Ensure that the battery is correctly replaced. Replace the battery
only with an identical type (CR2032or equivalent). Dispose of used
batteries according to the manufacturer’s instructions. Typical
battery life varies considerably and depends on operating
temperature and standby (shutdown) time of the system. Typical
life expectancy of a 225mAh battery is 4 to 5 years with an
average on-time of 8 hours per working day at an operating
temperature of 30°C. To ensure that the lifetime of the battery has
not been exceeded, you should change the battery after 3 to 4
years of service.