Serious problems with battery life in 17" MBP 2011

My battery seems to be getting worse and worse. Today I did a photo presentation pluged into the TV. Lasted about 20 minutes. Just flicking through photos, nothing intensive. My battery was at %100 when I started and when done it was at %62. %38 drop in 20 minutes and all I was doing is going through pictures. Something seems very wrong.
I would appreciate any intelligent advice.
Thnx!

From Tekserve in NYC. I purchase almost all my equipment there.
Hey there,
It looks like we actually can not replace this battery. Unfortunately because it's a 17" model, the batteries are no longer being made.
I would recommend searching on Amazon and seeing if you have any luck!
Apologies for the inconvenience,
Lindsay
TekserveApple Specialist - Macintosh Systems, Solutions and Service
Walk-in and mail address: 119 West 23rd Street, New York, NY 10011
Shipping address: 114 West 24th Street, New York, NY 10011
(212) 929-3645 phone / (212) 463-9280 fax / [email protected]
Then I sent an email saying Waaah!? And this was her reply.
Apple discontinued the 17" model and stopped making parts.
I recommend calling Apple directly at 1-800-MY-APPLE (1-800-692-7743).
You WILL be answered by a "robot" but it usually takes less than 3 minutes to get to a person.
Lindsay
TekserveApple Specialist - Macintosh Systems, Solutions and Service
Walk-in and mail address: 119 West 23rd Street, New York, NY 10011
Shipping address: 114 West 24th Street, New York, NY 10011
(212) 929-3645 phone / (212) 463-9280 fax / [email protected]

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