Earlier today I tried charging my Blu Studio 6.0 on my computer using the charger cord. The phone was off as I did this.
After a few minutes, I tried turning on the phone. It turned on and I left it alone overnight. When I unplugged the cord from the computer the next morning and tried turning on the phone again. It didn't turn on.
I tried charging the phone using a wall outlet for an hour, and I got the same reaction. It would turn on when it was plugged in but would die when removed from a power source.