电池使用寿命除了与电池容量有关外还与电池设计有关，一般情况下RTC电路耗电流在10uA量级，并且系统在S0，S3，S4状态下RTC电路会使用3.3VA的电，不会耗RTC电池的电，所以正常使用算上电池自放电等因素，RTC电池寿命都会在10年以上，按照参考电路来设计，不用担心电池自身寿命问题。
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