How to know when iPhone 6 plus is fully charged?

How to know when iPhone 6 plus is fully charged?

Added (1). It doesn't have the plugin sign to let you know when to unplug it

Go to General > Usage > Battery Usage > Battery Percentage: ON

It says 100% or the green battery icon is full if you don't have the battery percentage on.

  • Why won't my iPhone turn on until it is fully charged? So I have a second generation iPhone with the iOS4.3 software. If my phone ever dies, I will plug it in, and it will give me the "dead and not charged enough to turn on" picture. If it is charging for twenty minutes, and I unplug it, it will still say it is dead. My phone will only turn on when it is fully charged, It is really inconvenient. Why does it do that? Can i fix it or is it some glitch that came with the phone?
  • My new iphone died, altough it was fully charged I have only been using my iphone 4s for 4 days, and yesterday it died. The battery was fully charged and i was using it only minutes before it died. When I checked my phone minutes later I could not turn it on and the iphone felt very hot. I tried charging it today and after a while it started charging again, but now at 5%. What could have happened? Should I send it back?
  • My iPhone 5 is fully charged but won't turn on? It only turns on when its plugged into the charger. When i take it out it shuts off and doesn't turn on, even when its fully charged. When i try to turn it on, without the charger, It will show a white screen with the apple for about 5 seconds and then go blank and not turn on. Acting as if it was dead. Should I bring it to the apple store, or buy a new charger/battery? I have no idea why its not working. (no warranty i bought it online) (its a verizon phone if that helps)
  • My iphone 4 won't turn on, but I know it's fully charged. What should I do? My phone will not turn on. It was being a bit glitchy the night before but I ignored it. Anyways, whenever I plug my phone into my charger, it vibrates but I can't turn in on. The screen stays black. What should I do?