mobile

I have a big problem whit my LG G2 D800. Phones worked flawlessly since the day I got it, and I've had zero problems with it at all. This morning i restarted it, and it didnt turn back on ever. I tried plugging it into a different outlet with a different charge for an hour, tried vol- power and holding power for 5 minutes. it looks like the battery is dead. I apologize for my English , and appreciate your help