Next, How to Replace Your Old Battery
Opening up and replacing your old Macbook Air battery is a bit of a chore, but it's hardly impossible if you have a little patience.
Follow these instructions and set aside about five minutes of your time, and you'll be juiced up and ready to go in no time.
1. Power off your laptop and flip it over so as to see the four rubber grips and screws holding the body together.
2. Remove the exterior screws and set them somewhere that you will not lose them. It's very important you're able to re-screw the back onto your laptop.
3. Very gently remove the bottom plate from the laptop and view the inside. You should see nine more interior screws surrounding where your battery currently is. It is the large black rectangle taking up about half the space of the laptop. If you have trouble recognizing what part the battery is, it may be best to let someone else handle this job.
4. Remove the nine interior screws surrounding the battery.
5. Carefully remove the old battery from its resting place inside the computer and disconnect it. If you want to keep it, set it aside.
6. Using your new battery, plug the small connecting cable into the socket where the old battery once rested, and snap the new battery into the place of the old one.
7. Re-screw the nine interior screws.
8. Place the plating back onto the Macbook Air and re-screw the 10 exterior screws.
9. Turn on your laptop and check to make sure everything went smoothly.
10. That's it!