Patent ID: 8464079

Claim:
A power supply system, comprising: a system load; a battery; and a power management system that is coupled to the battery and the system load, wherein the power management system is operable to couple to an external power source that is operable to provide power for powering the system load and charging the battery at a first charge level, wherein the power management system is further operable, when coupled to the external power source, to: determine that a battery power level of the battery is greater than a first predetermined level that depends on a battery storage option and, in response, disable power from being supplied from the external power source such that power is supplied from the battery to the system load until the battery power level is below the first predetermined level; and determine that the battery power level of the battery is less than the first predetermined level and, in response, use the external power source to power the system load while charging the battery at a second charge level that is less than the first charge level until the battery power level is above a second predetermined level that depends on the battery storage option.