self contained battery

例句：

1. 1. The new car has a self-contained power source that can be used for charging the phone.
   这款新车有一个自给的电源，可以用来给手机充电。
2. 2. The self-powered battery is very useful for outdoor activities.
   自给电池对于户外活动非常有用。
3. 3. The self-contained battery system is designed to provide continuous power without needing external sources.
   自给电池系统设计为提供连续电力，无需外部来源。