automatic charging

例句：

1. 1. The new phone has an automatic charging feature that charges itself when it's not in use.
   这款新手机具有自动充电功能，当不使用时会自动充电。
2. 2. The car's battery needs to be charged automatically every few hours to keep it running smoothly.
   汽车的电池需要每隔几小时就自动充电，以保持其顺畅运行。
3. 3.The solar panels on the house are designed to automatically charge during the day and provide power at night.
   房屋上的太阳能板设计为白天自动充电，夜间提供电力。