Hi, i went to service center today because my AF2 doesn't charge after it get drain overnight. then the technician change the USB port. i though that was the only problem for not charging my AF2. then before i leave to SC my AF2 has 10% battery,when i got home my AF2 battery was drain again. i tried to charge it for an hour, i also trying to open the power button but it doesn't work even the led indicator light. please help me how to fix this issue of not charging when it get drain.