Battery Life - Please Look

Hello.

My name is Jay, and I've got an iPhone 5S running on iOS 11.2. I have contacted Apple Support for some advice like 5 times and all tips they gave me, unfortunately, didn't work. I factory resetted my iPhone so it's brand new and that didn't do anything, everything they told me didn't work and it's still dying fast now even when it's idle and in low-power mode.

I smashed my phone before all this happened and my phone was completely fine, when I got the screen replaced and battery replaced, my iPhone battery hasn't got better. When I'm not even using it, it dies. When it's in low-power mode, it still dies but a little less quicker (doesn't really make a difference). I even have the brightness on lower than 50% and it still dies as fast.

Any suggestions?