Chosen Solution
The battery is swelling through the trackpad of my macbook.
Here’s how to do it: MacBook Pro 15" Unibody Mid 2010 Battery Replacement Here’s the part: MacBook Pro 15" Unibody (Mid 2009-Mid 2010) Battery
well the first thing to know regardless of what model you have is whether or not you have a warranty or insurance on the mac. if so know that opening it yourself will void that. if you are not worried about warranties or whatever then simply find out what model it is like @danj said and look up where you can get a battery to replace your failing one. if you have the know how then you can replace it but i always have to say try to get a professional to do it because you do not want to make any mistakes and render your computer useless. the short answers of how to replace it are send it back to apple, take it to a professional, or take the bottom of the computer off find the battery take the old one out and replace it with the new on exactly how it was before you took the old one out. i hope that this helps
