Old car battery on ups Load & backup test [Yt-039]

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is video mein aapko bataya kya hai ki aap old car battery ko UPS per Laga kar Kitna backup Le sakte ho Jisne purani car battery ka use kar raha hun aur Usko Mein pahle charging Karunga aur isko fir 200w se discharge Karenge aur Dekhenge ki Kitna time tak backup dega
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