battery booster

基本解释

And yet I never stopped loving him and using his love like a battery booster whenever I needed to rev up my courage or soothe my sagging spirit.
但是，我对他的爱从未停止过。而他的爱更是我的充电器，在我需要勇气或是意志消沉的时候给我鼓励和安慰。
The newly designed Li-lon battery pack now has an audio amplifier built in, allowing you to use an external speaker, without the need for any external booster.
新设计的锂离子电池现在有一个音频放大器内置，让您使用外部扬声器，而不需要任何外部助推器。