charge-cap

例句：

1. 1. The battery needs to be charged before it can be used.
   电池需要充电才能使用。
2. 2. The capacitor is a component that stores electrical energy.
   电容器是一种储存电能的组件。
3. 3. The voltage of the power supply must be checked before connecting the device.
   在连接设备之前，必须检查电源电压。