Problems with Iphone 5s after replacing battery?

So I tried replacing my battery for my iphone 5s and I notice after i completed it. My phone would not turn on its screen and it kept vibrating whenever I try to charge it. And the worse part of it i that its over heating. Can someone explain to me what I did wrong and why is it overheating because that it worrying me the most?

Did you get the correct battery?

Is it an official iPhone battery or a cheap Chinese knock off?

Did you disconnect and reconnect the battery connection, correctly?

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