I have an early 2008 macbook that was running well until a week ago. I noticed the battery was not charging anymore. So I bought another battery for $20 on amazon. I installed the new battery and turned on the laptop. It was 69% charged on startup - so I waited until it fell to 0% and turned off on its own. Then I plugged in the adapter to charge it, and although it is charging, I still see a sign that says "Service Battery".
Do I really need to worry about this "Service Battery" message even though it appears to be charging?