Chart of Cycle count Battery Life

I have been surfing through the threads, but I really can't find my answer. I'm looking for a chart, or numbers that shows the beginning to limited of cycle count in battery life Macbook Pros. I have a Macbook Pro (Early 2008). I noticed that my Macbook Pro battery doesn't last long like before. So, I'm wondering when it is the time to change the battery, I want to be prepare. Also, it had happen couples of times that I forget to plug the charger, the Macbook Pro automatically shut down instead of going to sleep. I found it awkward because before it will go to sleep the Macbook Pro will give me a signal of low battery. But now it just shut down, I have to turn it back on. By the way, I use my Macbook Pro for editing since I'm in Film school. I really carry my lovely Macbook Pro aroundn with me. :3

My Cycle count life:

Health Information:
Cycle count: 687
Condition: Poor

Message was edited by: PibaPeebs

Message was edited by: PibaPeebs