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BQ78350掉电后电池容量不能保存吗?

Other Parts Discussed in Thread: BQ76200, BQ78350

BQ76200+bq78350组合使用,设备需要关机时,我的应用单片机会通过SMB总线发送POWER-DOWN命令给BQ78350,系统也能正常关机,但是每次系统重新启动后发现电池组相对容量及剩余容量都会归0,什么情况,有了解的高手请指点一下,谢谢。