Adopting the mechanism model and the system identification method, the power supply transacting electrocircuit (integrate manostat) is analyzed, and the restraining ability and the response for power supply transacting electrocircuit to overcome various battery defects are studied. The effects of the power supply yawp on the normal functions of the radio fuze are investigated. The research indicate that the shortcomings of the integration manostat as battery defects can be regarded as steady noise, and the restraining ability of the integration manostat to battery defects isn’t less than 50 dB.