Systems and methods for boosting battery voltage with boost converters are provided. Aspects include coupling a discharge path of a battery to an input side of a power converter in a power supply, wherein the power supply comprises a rectifier and the power converter. A charge path of the battery is coupled to an output side of the power converter and a processor monitors an output voltage of the power converter. The processor also monitors an input voltage of the power converter and responsive to the output voltage of the power converter dropping below a threshold voltage, the processor enables the discharge path.