My iPhone charger keeps turning off & on. Please explain to me?

So my iPhone/iPod charger keeps turning off, My phone keeps making these sounds. It's so annoying. Do I need to get a new charger? Or is it my phone? Please ANSWER.

You need a new charger, it has a shortage in it. My iPhone chargers do that sometimes. I'm on my third charger in seven months. Lol

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