How do you know when your iPhone is dying?

How do you know when your iPhone is dying?
Three Ways to Tell If your iPhone Battery is dying

It Won’t Charge When It’s Plugged In.
It Blacks Out Frequently.
It Burns Down Quicker Than You’re Used To.
It’s Running Slower Overall.
It’s Taking A Long Time For You To Do Basic Things.
Touchscreen Inconsistencies.
Syncing Issues.
A Drop.

Three Ways to Tell If your iPhone Battery is dying
  1. It Won’t Charge When It’s Plugged In.
  2. It Blacks Out Frequently.
  3. It Burns Down Quicker Than You’re Used To.
  4. It’s Running Slower Overall.
  5. It’s Taking A Long Time For You To Do Basic Things.
  6. Touchscreen Inconsistencies.
  7. Syncing Issues.
  8. A Drop.