How to make 9volt battery from cardboard | motor speed controller | simple diy project

About this video-
hello friends welcome to Hacker M aaj ke iss video me maine bataya hai ki kaise ghar pe speed controller ya 9volt battery bana sakte h
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Hastags:-
#hackerm
#9voltbattery
#9v
#speedcontroller
#diyspeedcontroller
#2inone
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WARNING - This video is for fun. anything you try is as YOUR OWN RISK we will not Be RESPONSIBLE for Any Situation or Loses
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