I get what you are saying but it's working good now, why not just keep running it the way it is?
Because you're just addressing the symptoms (bad battery life/bad phone performance) not solving the problem (remove problem app, or at the very least *identify* it).
If you break your leg and you're in pain, and you keep taking painkillers, you stop feeling the pain, but your leg is still broken.
We're saying find the broken leg and fix it. Don't just keep popping pills.
I firmly believe everyone SHOULD have a task killer installed. Just DON'T set it to "auto" kill. Use the task killer *manually* to kill specifc bad apps *as needed*, not on a schedule.
ATK doesn't give you the information you need to make a good kill decision. Overactive CPU cycles kill battery and phone performance. Not apps cached in memory.
So if you want to fix the broken leg, install Watchdog Lite (see my signature for link. I'm not affiliated with them. I just think the app is awesome at diagnosing bad apps)... and check out the app or apps that it alerts you to that are running too many CPU cycles. Then you can decide to kill the bad app then and there, or let the app run, or at some point if you'd rather uninstall the app altogether. AND you will know what the bad app is.
Bottom line is *you* should make an informed kill decision, don't let your task killer make it for you.