Patent ID: 8564447

Claim:
A method of controlling a battery life indicator for a primary battery of an electronic device, the method comprising: monitoring a battery voltage of the primary battery; obtaining at least one operating parameter of the electronic device other than the battery voltage of the primary battery; and generating the battery life indicator with characteristics that represent remaining battery life of the primary battery, wherein the characteristics are dictated by the monitored battery voltage and the obtained at least one operating parameter; wherein: the electronic device further comprises a secondary battery; the electronic device operates in a first power phase during which only the primary battery supports functions of the electronic device, a second power phase during which both the primary battery and the secondary battery support functions of the electronic device, and a third power phase during which only the secondary battery supports functions of the electronic device; and obtaining the at least one operating parameter comprises determining whether the electronic device is operating in the first power phase, the second power phase, or the third power phase.