Replacement Battery Cost $160
I had the "Service Battery" issue with my early 2011 MBP so I took it in to my local Apple Store. Big mistake! I had installed an SSD and moved the original HDD to the optical drive location. I also installed 8 GB of memory. All this was done about a year ago.
Anyway, the Apple "Genius" did a diagnostic and said I needed a new battery! So, I said great, how long will that take. He said I had the Apple Care warranty until June 2014 so that was good. Then he took my MBP to the back and came back out with it and a sour look. He said, "You've modified your MBP." I said, "Yes, I made it better, but nothing I did has anything to do with a battery."
Of course he said, "Tough, you voided your Apple Care warranty by doing that and we won't touch it even to replace the battery!"
Of course I said, "Crap! You've got to be kidding?"
Unfortunately he wasn't even after I talked to a manager. They did recommend I take it to a local authorized repair shop and ask them about it. I did just that and the repair shop took my MBP, replaced the battery and charged me $160 for it but no labor saying the labor was covered under warranty but the battery was a consumable!
I learned very quickly that I'll never go back to an Apple Store for anything!
And now I understand that the early 2011s may have a graphics card problem????