I bought an Asus netbook some years ago. The battery(easy to put or remove) died pretty soon, so I went to see the replacement new battery cost more that what I paid for the netbook.

As it has a special shape is it very difficult to replace with a generic battery, and it is on purpose.

I see all the manufacturers doing the same if they can. As a geek I could make it to work but 90% of the people can't.