The function of the electric guitar pickup converts the energy of the guitar string vibration into an audio signal, and then sends it to the low frequency amplifier to amplify it, thereby promoting the speaker to play. Currently, the commercially available uniform is an electromagnetic pickup, which is complicated to install and cost. Battery Management Systems For Lithium Cells battery management system Shenzhen Zhifu New Energy Co., Ltd. , https://www.sunbeambattery.com