What does a red lightning bolt in the battery icon indicate?

[Android Central Question]

I'm using Samsung tablet Note 10.0.
I really need answers asap.

 

[B. Diddy]

Welcome to Android Central! Are you talking about the small battery icon in the status bar, or the large one that shows up in the center of the screen when the tablet is powered off and plugged in? Is the tablet having problems charging up or maintaining a charge?