A method and apparatus for injecting fluid into areas having high density tissue that creates a high backpressure resistance on the injection device is disclosed. One or more key events is determined from the plurality of patterns of events. In condition I, the time for which the fats and oils are brought into contact with the water vapor in a temperature range of 175\xb0 C. The display device is connected to the media playing device via a video interface and a audio frequency interface, obtains and displays the network information. The present invention can easily detect the SOH of a battery within a short period of time to solve the existing problems of being time-consuming and complicated in determining the SOH of batteries and causing incorrect determination of battery capacity and additional maintenance cost.