My iPad turned red and shut down, how do I get it to start back up?

[iMore Question]

My I pad turned red and shut down. It wont start back up???

 

[kch50428]

Re: My ipad turned red and shut down. It wont start back up.

Battery depleted? Plug in... and leave it alone... it may power on once it's charged back up partially... but I'd leave it for at least 3 hours.