Solution 1: When the parent unit has been charged for the first time, the operating time is less than 24 hours. The rechargeable batteries only reach their full capacity after you have charged and discharged them at least four times.

Solution 2: The volume of the parent unit may be set too high, which causes the parent unit to consume a lot of energy. Decrease the volume of the parent unit

Solution 3: The microphone sensitivity level of the baby unit may be set too high, which causes the parent unit to consume a lot of energy. Decrease the microphone sensitivity level using the SENSITIVITY button on the parent unit.