Comments by "Digital Footballer" (@digitalfootballer9032) on "Как работают батареи — Адам Джекобсон" video.

Here's another penny's worth of information for free. What us Americans call "flashlights" (British "torch") got their name because of early batteries. In the late 19th century, cops carried flashlights on their beat at night. Since batteries back then did not last long, the officers would simply "flash" the light into dark alleys on patrol to save on the battery. Hence the name flash-light. They were also very large and cumbersome devices in those days.
13