CHT 9000 Battery meter

Bought it only one day, no screen problem at all. Everything is fine except the battery meter. It stay remain at 90%, even I charged whole night. I start using until now (noon), the battery still remain 90%???

I made more than 10 calls via BT headset and running few applications. Anyone have similiar problem?

I am so happy if the battery life can last so loooooong!?

My S/N is HT632F