Why does my iPhone 5c battery die so fast?

It started dying when my charger started messing up. Like I have to turn my charger a certain way. But I ordered a new charger, it's currently being shipped to my home. Also when my phone is on lockscreen and I come back to it my phone battery percentage be down a lot. My brightness is down, and I close my background apps. And turn Wi-Fi off when I don't need it. What's is wrong?

It is either the charger, the battery, the cable or the lightning port.

Your faulty charger might have messed up your battery. I hear iphone 5… Uses a lot of battery.

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