So do you own a Macbook air with a dead battery? So did I, a few days ago my Wife purchased a Macbook Air 2008 for relatively cheap on ebay. The purpose of which was to use for writing her own blog and novel. Main requirements were light weight, good battery life… The Macbook Air in question was a bargain with a dead battery.
Replacing the battery on these is pretty straightforward. You need to ensure you get the correct model battery as they have changed the connection port a few times. The easiest way to do this is using the guide on Apples website : http://support.apple.com/kb/ht3255
I used the following search term on ebay to ensure I got the correct model. MacBook Air Models A1237 battery. Once ordered and you have the battery you need to remove the bottom case.
The locate and disconnect the power cable (be careful the pins are delicate )
Pop in the new battery.
Re secure the bottom case