Wireless sensors can be integrated with energy collection devices for Long-term Autonomous Battery Energy Management. The existing research is based on the state of the battery is fully known, but accurate estimation of this information is difficult to achieve. In this paper, a performance index function is defined to compare the advantages and disadvantages of different transmission strategies. Considering the process of energy collection, the specific method of energy independent reaching optimization is analyzed. Combining the information of energy transmission channel gain, the corresponding transmission strategies are designed for different scenarios. Based on the analysis of the performance index and simulation of the strategy, the optimal transmission strategy of the Wireless sensor network is obtained.