I found my TP went to 0% last night even though it was still on. If I recall correctly, I turned it off; or maybe not. Fast forward to today, I plugged it in to charge it and now I see a battery icon with a lighting bolt and a red bar at the bottom. I can't boot the thing normally. I tried the home button and power button and just turning it on regularly but I still cannot get past that screen. Sometimes there would be a ! instead, then back to the battery.

Any idea how I can boot normally? Or what this means.

EDIT: NM I'm stupid, I think I just had to wait until it had more charge. I thought you can just plug it in and have it work like any other hardware :X Sorry! My impatience.. Delete post please!