My iphone 7 battery isn't working?

My iphone 7 battery isn't working?

Added (1). I have my iphone 7 three months and the battery has just given up. The phone has a slight crack on the top corner of it and i've no insurance. The phone company are charging me just to send it away to fix it even though i just need a new battery. Any suggestions?

Really?

A new battery isn't going to repair a crack.

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