Why does my iPhone turn off prematurely?

It never even gets to 1% anymore. It shuts off at 2% most of the time, but can be a lot sooner.
Why is this? Is there any possible solutions?

How long have you had the same battery for your phone? It's possible your battery is no longer able to hold a charge and you may need to have it replaced. I would go ask someone at the store you bought your I-phone from.

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