Blackberry needs charged at least twice a day?

I have a blackberry curve 8520 & it needs charged at least twice a day, I hardly ever make phone calls, I only receive emails never send them, I don't send more texts that the average person, I never use the camera & the only app I use is the facebook one but I only go on a couple times a day. I make sure I exit everything so there's nothing running in the background, I installed the battery booster app, I bought a new battery from ebay but it's still exactly the same. Any advice?
 
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