Communication terminal device, remaining battery amount calculation method, and recording medium storing remaining battery amount calculation program

A remaining battery amount calculation method, comprising:

• detecting, by an arithmetic processor, an operation performed on a communication terminal device operating based on supply of electric power from a battery;
• detecting a duration time of the operation;
• detecting an external environment of the communication terminal device;
• and
• calculating a first remaining battery amount of the battery based on the operation, the duration time, and deterioration of the external environment.

A computer-readable recording medium storing a remaining battery amount calculation program, the remaining battery amount calculation program comprising:

• detecting an operation performed on a communication terminal device operating based on supply of electric power from a battery;
• detecting a duration time of the operation;
• detecting an external environment of the communication terminal device;
• and
• calculating a first remaining battery amount of the battery based on the operation, the duration time, and deterioration of the external environment.