主要用于单节锂离子电池充电控制，采用美信半导体公司得锂电池充电芯片，其工作原理如下：有电池插入时，LED亮，蜂鸣器发出提示音，系统进入充电。-Mainly used for single cell Li-ion battery charge control, the use of Maxim Semiconductor chips have lithium batteries, it works as follows: a battery inserted, LED light, buzzer tone, enter the charging system.