My iPhone automatically turns off by itself

Please follow the steps in the following link for support with this issue: If your iOS device restarts or displays the Apple logo or a spinning gear unexpectedly

My phone is turn off automatically in 11second

Sangi2 wrote: "My phone is automatically turn off by itself"

What model of iPhone is it?...

Settings > General > About > Model Name

And does it still have its original battery?

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