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My phone wont turn on anymore. I already did the hold home volume up and power button. Still doesnt turn on. Try to charge it but the phone still doesnt turn on and it keeps overheat when i left it charge it.. Then i try to investigate i removed the back cover of the phone then i saw my battery’s connector to the motherboard is cut off. Kindly see the image link below. My question is it possible to fix this or do i need to buy a new battery? I think this is the one cause of the problem not 100% sure https://imgur.com/a/8fWpk image 1 https://imgur.com/a/aAKxR image 2

Hi! It’s almost impossible to re-solder the battery ribbon connector, unless you have very good micro-soldering skills and are willing to put up with the risk of causing a fire while working with the hot soldering iron near the battery. Try replacing the battery, as you said, that should be a good place to start from.