[Q] Bricked or battery dead?

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http://forum.xda-developers.com – I am now reverting my phone to stock, I've flashed the stock rom image and while I was downloading the appropriate RUU I left my phone on, in the bootloader for around 2 hours while I had around 40% battery. Now the phone turned off and I have red LED blinking, and the phone doesn't turn on even when I press powerkey + volume down, is that because battery is empty or is it bricked? (HowTos)