Method to charge battery and electronic device including battery

A wearable electronic device comprising

• a battery;
• a charging part configured to be connectable to an external charging device to charge the battery;
• a memory;
• a wireless communication circuit configured to establish wireless communication with an electronic device;
• and
• a processor operatively connected to the charging part, the memory and the wireless communication circuit, wherein the processor is configured to:
• determine whether the charging part is connected to the external charging device,
• determine whether the wireless communication circuit establishes the wireless communication with the electronic device,
• determine whether the wearable electronic device is fixed when the wireless communication is released,
• determine whether usage time information of the wearable electronic device of a user corresponds to a second time range other than a first time range in which the user is using or is expected to use the wearable electronic device when the wearable electronic device is fixed, and
• reduce a voltage at which the battery enters supplementary charging to a second voltage lower than a first voltage which corresponds to a value stored in the memory when the usage time information of the wearable electronic device is within the second time range.

A method of preventing a battery from deteriorating as a wearable electronic device is charged, the wearable electronic device including a battery, a charging part configured to be connectable to an external charging device to charge the battery, a memory, a wireless communication circuit configured to establish wireless communication with an electronic device, and a processor operatively connected to the charging part, the memory and the wireless communication circuit, the method comprising:

• determining, by the processor, whether the charging part is connected to the external charging device,
• determining, by the processor, whether the wireless communication circuit establishes the wireless communication with the electronic device,
• determining, by the processor, whether the wearable electronic device is fixed when the wireless communication is released,
• determining whether usage time information of the wearable electronic device of a user corresponds to a second time range other than a first time range in which the user is using or is expected to use the wearable electronic device when the wearable electronic device is fixed, and
• reducing a voltage at which the battery enters supplementary charging to a second voltage lower than a first voltage which corresponds to a value stored in the memory when the usage time information of the wearable electronic device is within the second time range.