The present invention discloses a power device and a boosted circuit used for the power device. The boosted circuit comprises a boosted circuit used for a power device. The boosted circuit comprises an access terminal configured to access a direct current voltage from a battery pack; a transformer bank electrically connected with the access terminal to boost the accessed direct current voltage through the transformer bank to a preset voltage; a rectifier bridge electrically connected with the transformer bank to perform pulse rectification of the predetermined voltage and convert the predetermined voltage to a high-voltage direct current, wherein the transformer bank comprises: a first transformer comprising a first primary side and a first secondary side, a second transformer comprising aprimary side and a secondary side, wherein the connection of the first primary and the second primary is one of serial connection and parallel connection, and the connection of the first secondary side and the secondary side is the other one of serial connection and parallel connection. The power device can output an alternating current while being compact in structure and convenient to carry.