Ok. Hold on. Let's do this . . .
Did you download and install the blackberry desktop software on your computer? If not, do it and then come back.
Next, plug in the blackberry to the computer using the usb. Don't use a usb hub or keyboard usb connector. Do as I suggested above. Wait a while and then remove the battery for a moment and replace while the blackberry is still plugged into the usb. If the blackberry boots up, let it finish charging. If it doesn't and you still see the no battery symbol, wait a while longer and try again.