用英语说电量不足怎么说

"Low battery" 是表示电量不足的常用说法。其来源为计算机及手机等电子设备中，电池电量过低时系统会显示“low battery” 或 “battery low” 作为提醒。

例句：

"I have to end the call, my phone's battery is low." (我得结束通话了，我的电话电量不足。)
"Please charge your device, the battery is running low." (请给你的设备充电，电量不足。)
"The battery level is getting low, please plug it in" (电量过低了，请插上充电器)