松翰单片机2711B用于移动电源充电，程序包括电池的预充电，恒流充电，恒压充电，放电状态的大电流保护，电池低电压保护。无负载自动关机。跑马灯指示灯电量指示程序。-Sonix microcontroller 2711B for mobile power charging, the program includes pre-charge the battery, constant current charging, constant voltage charging, high-current protection, low battery voltage protection discharged state. No load automatically shut down. Marquee battery indicator lights program.