无线信号充电器的英文：
Airnergy Charger

可以把接收到的WiFi信号转换成电能，给手机等便携数码设备充电。只要有WiFi信号覆盖的地方，就可以方便的给数码设备充电！充满电基本上在5个小时左右，和插电源的充电器基本相当。

charger是什么意思：
n. 充电器；战马；袭击者

You need to be a hard charger here.
你要做一个强势的突击者。

Each came equipped with a charger that plugs into an electrical outlet.
每一个机件都装有一个可插入电源插口的充电器。

Trickle charger (device for the slow continuous charging of an accumulator)
涓流充电器(使蓄电池缓慢而连续充电的装置).

wifi是什么意思：
abbr. 无线联网技术

Wi-Fi is short for wireless fidelity.
Wi-Fi是wireless fidelity的缩写。

The cost to set up this kind of Wi-Fi network is usually less than US$300.
建构这类无线传真网路的费用通常不会超过三百美元。

He installed a wireless fidelity (Wi-Fi) network in the barbershop to offer customers high-speed wireless Internet access.
他在理发店里装设无线上网网络，让顾客享用高速的无线上网服务。