[Help] W910

[senter]

Hello ,i'm new here and sorry for my bad english .
I have some probs with my fone (W910):
When i charged full 100% and listened to music for 1 hour with earphone .the batterry status remainning about 64%.Then i do not use fone for next 6 hours.After this time ,my fone is turn off and i cannot turn it on by power button .I have to charged it again .
What's happening with my fone ? i try to buy new baterry and use universal charger ,but it still have this probs.Does any idea to help me ?.thanks for reading !

Disable 3G mode from Menu > Settings > Connectivity > Mobile networks > GSM/3G networks > Only GSM