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## 锂电池充电电流
注意要点：
1、电路需要用MOS管1对锂电池供电进行关断处理，当采用USB供电的时候，供电电路自动切换到USB供电模式。
2、电路需要用MOS管2防止负载电路对电池进行电流倒灌。
郭天详关于锂电池充电电路讲解
https://www.bilibili.com/video/BV17Q4y1k78s?spm_id_from=333.999.0.0
https://github.com/peng-zhihui/Peak/issues/4