Patent ID: 8000172

Claim:
A time control terminal including a main battery and not being equipped with an auxiliary battery for real time control, comprising a processor, a display unit, and a memory; the processor is configured to: measure current time and update a current time value stored in the memory according to said time measurement; display the current time to a user on the display unit and to store a time value in the memory corresponding to the current time sent to the display unit; when the battery is removed and then mounted back, store a default set time in the memory as the time value, the default set time being earlier in time than the current time value; and during powering on, determine whether the time value stored in the memory is earlier than the current time value stored in the memory, and if so, determines that the main battery has not been removed and does not perform a time setting operation, and if not, determines that the main battery has been removed and performs a time setting operation.