Phone keeps powering off

About a month ago my phone started randomally powering off.  The phone is fine while it is plugged into the charger, but as soon as i disconnect it and try to do anything with the phone, it powers off.  Then is wont stay on at all.  I figured it was the battery, so I purchased a new one, same problem.  I dont have an upgrade until July, has anyone had this problem? Frustrated!!!!

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Re: Phone keeps powering off
Enthusiast - Level 2

I did.  It ended up being the Advanced Task Killer application was causing the issue.  Verizon suggests removal of any task killer applications.