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المصادر : - https://www.wsj.com/articles/theres-a-global-race-to-control-batteriesand-china-is-winning-1518374815

https://www.thoughtco.com/invention-of-the-flashlight-1991794

https://www.qualitylogoproducts.com/promo-university/history-of-flashlights.htm

https://www.thermofisher.com/blog/microscopy/the-history-of-the-lithium-ion-battery/

https://www.visualcapitalist.com/evolution-of-battery-technology/#:~:text=The%20Daniell%20cell's%20electrical%20potential,voltage%2C%20equal%20to%20one%20volt.&text=The%20lead%2Dacid%20battery%20was,by%20French%20physicist%20Gaston%20Plant%C3%A9.

https://qz.com/338767/the-man-who-brought-us-the-lithium-ion-battery-at-57-has-an-idea-for-a-new-one-at-92/

https://phys.org/news/2015-04-history-batteries.html#:~:text=The%20first%20true%20battery%20was,produced%20a%20continuous%20stable%20current.