I agree that certainly sounds like a battery issue. I'd recommend that you buy a new battery especially since you already checked the software side of it when you downgraded to test it and then upgraded and found No improvement in battery performance. The best part about batteries is that RIM made it easy for you. To change and replace it yourself. Also if that does'nt work you can still return the battery if you save the receipt. Lastly you could also do the extreme thing buy a new BB. I typically buy a new phone once every 2 to 3 years to stay ahead on the techno front. My brother on the other hand will keep his phone even after that His phone has broken keys a scratched screen that does'nt work anymore dents all over it and he won't upgrade it because the phone part still works as long as he can hear the phone ring and make and receive calls he won't upgrade it. His opinion is that RIM makes a quality product that he'll keep over the hype of a NEW Phone thing. I just live and let live way to go bro.