In an embodiment, a power apparatus operating method includes receiving a mode switching signal to control an operating of a power apparatus to provide and/or receive a preconfigured load; sensing an enable route current of an enable route, and a bypass route current of a bypass route, wherein the enable route current flowing through a battery module including one or more batteries, and the bypass route current does not flowing through the battery module; and controlling driving a first and a second switches by using a negative feedback control and an open loop control, to perform a current switching between an enable mode and a bypass mode of the power apparatus, based on the mode switching signal, the enable route current and the bypass route current, wherein the enable mode uses the power apparatus and the bypass mode bypasses the power apparatus.
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