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Real-time Clock Battery

You may need to replace the real-time clock (RTC) battery because of its battery life span. The battery powers the clock in the absence of power. When the battery starts to weaken, it loses voltage, and the system settings stored in CMOS RAM (for example, the date and time) may be wrong.

The battery (Vendor Part No. CR2450) is a commodity part available through many vendors. Its located on your system board as shown in Figure 5-9. Notice the plus (+) sign on the battery. This sign will assist you in correctly positioning the battery on the system board. Contact your sales representative or dealer for a list of approved devices.

CAUTION: Danger of explosion if battery is incorrectly replaced. Replace only with same or equivalent type recommended by manufacturer. Dispose of lithium batteries as required by local ordinance or as normal waste if no local ordinance exists. Do not expose the component to excessive heat or fire. Keep all batteries away from children.

Figure 5-9. Location of the Real-Time Clock Battery

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Zenith Data Systems MT2000 manual Real-time Clock Battery, Location of the Real-Time Clock Battery