What is wrong with my Macbook's trackpad?!?!

Okay, so I've had my Macbook for 2.5 years now and it is the 2008 White Model.

For the past few months now, I've noticed that my track pad button (this isn't the unibody track pad) has sunk in. Like it literally doesn't even push in. I checked online and read various methods to see how to fix, such as trying to remove dust/lint possibly stuck under, but that is not the problem.

You see, when I remove my macbook's battery, but trackpad button works just fine. I'm able to click on it perfectly and I can feel the button clicking. When I put my battery back in, it feels like the battery is pushing against my trackpad and I'm not allowed to click on it. It just becomes flat or "stuck."

At one point, I was able to click on things on my computer simply by tapping the right side of my arm rest. Yes! The arm rest! What is going on here?

This is so frustrating because even the slightest touch to the trackpad will cause me to double click. When I type, this results in highlighting the entire paragraph and deleting everything. What is going on?

iThinkergoiMac said:

Is your battery swelling at all? Lay it on a flat surface and look on level with it, there may be a slight bow in it. If so, that explains the issue with your trackpad (and also means you shouldn't use the battery).

Click to expand...

So I found this blog online:

http://www.manu-j.com/blog/macbook-trackpad-not-responding-working-battery-blame/379/

It seems this person is having the same symptoms as me. I took out my battery, and I think it is a little "bowed," although it doesn't look as bad as the one in the picture from the blog. It's actually hardly noticeable unless you really look at it closely.

What can I do about it? And why shouldn't I use the battery? Should I go to an Apple Store and talk about it with the Genius Bar? As far as I am concerned, this isn't my fault. I didn't do anything to "bend" the battery. According to the blog, Apple replaced the battery for free. How likely is this? I think it would be utter bull crap if I'd have to sell out $100+ for a new battery, especially since the one I have wasn't even damaged by me.