Why does my clock radio lose time?
This can be due to power interruptions and the status of the backup battery installed in the unit. For example, if a power interruption occurs and the clock radio operates on a backup battery, time may be gained or lost depending on the strength of the battery.
What causes a battery operated clock to lose time?
The most common cause of an analog clock losing time is that there is buildup in the battery compartment that is keeping the battery from connecting fully with the clock mechanism. Remove the battery and check the leads to see if there is any buildup from a leaky battery, dust, etc.
Why are car clocks inaccurate?
Most of the clock in todays’ cars use electronic crystal oscillators. Crystal oscillator sold for around a dollar or less in bulk have a typical error tolerance of +/-100 ppm. Temperature changes and aging can contribute another +/-100 ppm.