I bought a 2009 Macbook Pro off of Craigslist for 200 dollars, it has 8Gb of ram with a 120Gb SSD, the only problem is that there was a small dent at the top(No big deal) and there was no battery. But works flawlessly plugged in. I went on amazon and bought a battery for it and installed it and it is recognizing the battery, it just always is at 0%. I took it to apple and they said they can't deal with a third party battery. WHAT DO I DO???