Battery of a 2.5 year old MacBook Air needed replacement.
Not yet completed. When following the instructions from iFixit to remove the battery (which by the way are excellent !!), I found that the battery I had ordered from another supplier (iFixit does not have this article available) was the wrong one. I am in the process of getting that fixed, and re-installed the original battery. I will let you know the final outcome (with pictures) as soon as the correct battery has been delivered.
Eye-opener to me was that some of the articles from Apple (which I am and will stay an advocate of) are not as rigid (in terms of replacing parts) as they are thought to be. Companies like iFixit help take the life cycle of your equipment to the next level.
Just make sure that when ordering replacement parts, you look for as many references as possible (serial numbers, model numbers, ...) before ordering, in order to avoid getting wrong parts delivered.
The tools from iFixit are great quality/value ratio.