The 4 hours lifespan

I bought out a fully charged bb out @ 11.30am.
Now its nearing 3pm, and its already dying!
And I didn't even use much :(

Last week, I left house @ 6am with a fully charged bb.
Went to work, can't use my phone much during work.
During the 10am tea, its already flat -.-

So @ night, after I charged my bb full bar.
I switched off my bb before I sleep.
The next morning when I woke up, its already FLAT-.-

But the thing is I don't charge my bb overnight!
And the Starhub person say no stock for bb curve.
Cos its a one-for-one exchange warranty.

Me: Roughly how long do I have to wait?
Starhub girl: Sorry, we are not sure when the stock will come..
Me: Will the stock never come?
Starhub girl: No, the stock will come..
Me: when?
Starhub girl: We really don't know but we will call you once its here :)

Omy, when?:(
I already cannot stand not having my phone with me.
Now I'm trying to use as much as possible.
Since with/without using it, it will still die in 4 hours time. Haha.

Maybe I shall change phone?:)
iphone 4 or bb torch?
freshly sent from my wanna-be-pink white BlackBerry!