Ok I know the task killer topic has been debated a lot and I always used ATK just because it was the first one that popped up when I searched it. However, my battery life was always horrible...about 6 hours before a charge. I was complaining to a friend of mine who has an evo and he told me to try Advanced task cleaner and use the autokill option for apps that open for no reason. So I tried this and I seriously have gone up to about 14-15 hours of battery life and I use my phone a lot. Check it out for what its worth. I think you'll be impressed.