normal charging period

例句：

1. 1. The battery's normal charging period is six hours.
   电池的正常充电期是六小时。
2. 2. During thenormal charging period, the device will chargeat a slower rate.
   在正常充电期内，设备将以较慢的速度充电。
3. 3. The manufacturerrecommends that you fully charge the batterybefore using it for the first time.
   制造商建议在使用首次之前，请确保完全充满电。