I have had a BlackBerry Curve 8520 for nearly 2 years, and the battery had gotten really bad so recently I bought a new battery. For the first maybe week or so it was brilliant and would last a whole day without needing to be recharged. But now, about 3 weeks later, it needs charging after about 8 hours (8AM-4PM) with very little use during that time. It is only slightly better than the battery I had previously that is only a year old! What is happening?
I have reverted back to the original theme, deleted all unnecessary apps (rarely use any anyway, apart from BBM), deleted all old messages, formatted my Micro SD card, yet it is still not performing well. But my sister who has had the same phone for the same amount of time, still easily lasts over 8 hours!?
The only thing that I think it could be is that I have ~500 email address on my phone, ~100 phone numbers, and about ~250 BBM contacts. Would this affect it though?