I currently have a MacBook Pro, mid 2009 type that has been working great so far. A year ago I upgraded the memory just to get it working faster. Last month for the first time something went wrong when the hard-drive crashed and I had to change it. I replaced it to a SSD which is working great. Then last week I got a notification that the battery needs to be replaced soon. It still works fine though, drains perhaps a little faster than it used to but nothing that bothers me. I'm just wondering, do you think it would pay off to replace the battery? if I replace it, how long do you think it will live. Are there any known factors in this type that are likely to fail at this point? Processor, display card etc? I'm just not sure if I should replace the battery (which is rater cheap compering to other things) or if I should lay this MacBook to rest and buy a new one. What do you think?