Method and apparatus for efficient battery use by a handheld multiple function device

摘要

A method for efficient battery use begins by monitoring at least one output of the handheld device for an overload condition. The processing continues by monitoring a system voltage produced by a DC-to-DC converter for a system low voltage condition. The process continues by monitoring voltage of the battery for a battery low voltage condition. The processing then continues by enabling one of a plurality of fail-safe algorithms based on when one or more of the overload condition, the system low voltage condition, and/or the battery low voltage condition are detected.