My iPhone 6 suddenly turned off and wouldn't turn back on?

I plugged the phone into my macbook and it turned on in a few minutes. When i unplugged the phone from the laptop it would turn off again, i've done this about 3 times now. Any help would be appreciated.

Check if the battery died:-P then if that does not work, plug it in your macbook then open itunes and see if your iphone would come up, if it does, reset it Please BEWARE THAT THIS WOULD PERMANENTLY REMOVE YOUR DATA ON YOUR IPHONE you are responsible for your data. No worries if you have your data synced. No solution then go to a Genius at the Apple store.

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