Why is it that the icon of charging is not showing while i charge it off?

[AC Question]

Everytime when we charge our phone while it is turned off we can notice how many percent it is.but my phone is not showing any icon or percent if i charged it while its off but it is charging.but my problem is i should first turn on my phone to check if it is full charge.

 

[B. Diddy]

Welcome to Android Central! Which phone?