Hi my name is ***** ***** i will be assisting you today.
I am sorry to hear that you are facing problem with your Kindle, i will try my best to resolve the problem at the earliest.
Press and hold down the power button press it down for 45 seconds.
connect the ac adapter after 3 mins and turn on the power it normal mode
leave it for charging for 3 hrs it will fully charge the battery and will be normal to use.
let me know how it goes.