powerbank
noun [ C ] trademark in UK (also PowerBank, power bank) uk/ˈpaʊəˌbæŋk/ us/ˈpaʊ.ɚˌbæŋk/
充电宝
a brand name for a piece of equipment for charging (= putting energy into) an electronic device such as a mobile phone, instead of plugging it into an electrical socket in the wall
The best powerbank for you depends on what you need to charge and how much juice you need away from the mains. 什么样的充电宝适合你，取决于你需要给什么东西充电，以及在没有电源的情况下需要多少电量。
Portable power banks consist of a special battery in a special case with a special circuit to control power flow. 便携式充电宝内含一个特殊的电池，装在一个特殊的箱子里，有一个特殊的电路来控制电量出入。
- More examples
- Generally, you should charge the powerbank first before using it.
- Most power banks have 4 LED lights that indicate the level of charging.
- Power banks have become increasingly popular as the battery life of our beloved phones, tablets, and portable media players is outstripped by the amount of time we spend using them each day.