Hello and welcome to Android Forums! If you've let the battery drain to zero charge and stay there, it is quite possible that the Li Ion battery is ruined. Try removing the battery and seeing if the phone will boot while plugged into the charger. If it does, then you'll need to replace the battery.
Hello, Welcome to the forum. I would just replace the battery because I don't know if its defective and probably might cause damage to the phone. Enjoy your time here. Happy Holidays
