battery power supply unit

基本解释

As a result, the AC supply lead must be removed from the unit in order to operate the unit on battery power.
因此，如使用机内干电池，须将连接本机之交流电源导线拔去。
chinafanyi.com
The unit also offers voice guidance support in local languages and has multiple power supply options, including use with an automobile battery.
它还有本地语言的语音指导，支持多种电源选项，包括汽车电池的使用。
www.21csp.com.cn
This paper introduces a design of low power consumption of remote terminal unit based on solar battery, so as to realize the data supervision and control in no power supply.
提出一种基于太阳能电池的低功耗数据终端的设计方案，实现无交流电场合的数据监测与控制。