or a poor connection at one of the battery cables.
The starter requires a very large amount of electrical current to operate, and this power is supplied by the battery. When a battery starts to become weak, the high current demand from the starter can momentarily cause the battery voltage to drop very low when the starter is cranking the engine. If the battery voltage momentarily drops below what is required to keep the memory for the clock operating, it will cause the clock to reset (ike when the power at your hose flickers and causes your microwave or VCR clock to reset).
The starter requires a very large amount of electrical current to operate, and this power is supplied by the battery. When a battery starts to become weak, the high current demand from the starter can momentarily cause the battery voltage to drop very low when the starter is cranking the engine. If the battery voltage momentarily drops below what is required to keep the memory for the clock operating, it will cause the clock to reset (ike when the power at your hose flickers and causes your microwave or VCR clock to reset).