I assumed the same. I bought the battery from iFixit[1], and I am back to the original of 4ish-5ish hours. [1] https://www.ifixit.com/Store/Mac/MacBook-Pro-15

I assumed the same. I bought the battery from iFixit[1], and I am back to the original of 4ish-5ish hours. [1] https://www.ifixit.com/Store/Mac/MacBook-Pro-15-Inch-Unibody-Mid-2009-Mid-2010-Replacement-Battery/IF161-105?o=4 https://www.ifixit.com/Store/Mac/MacBook-Pro-15-Inch-Unibody...