Macbook Pro battery draining uncommonly fast
Recently, over the past weekend it seems like, my battery power has started draining uncommonly fast. I have a 2010 mid year Macbook Pro, and I've taken excellent care to prolong the battery life. Previously, it was lasting at 7 hours without charge, but these past two days it can barely go 2. The activity monitor shows no heavy applications, but it says finder needs 99.7% of my CPU to run. Is this normal? Is this what is causing my battery drain? What do I do?
MacBook Pro, Mac OS X (10.6.1)