The portable solar movable power source is more miniature and portable by adopting various software control technology, thereby achieving the movable and portable power source in a real sense.
2
在19世纪晚期，欧洲和美国的电气化进程开始将蓄电池大规模用于电信技术、便携式电灯系统和后备电源。
The electrification of Europe and America in the late 19th century sparked the use of storage batteries for telegraphy, portable electric-lighting systems and back-up power.
3
这样可以增加它的便携性，可以拿到教室或其它实验室。 这些地方都没有足够的电源供应。
This feature only enhances the system’s portability, allowing it to be taken to classrooms and other research labs where large power supplies are unavailable.
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