That may be the case, i wasn't aware they did that, heres the link to what i read, but i couldnt find it yesterday:
http://support.apple.com/kb/HT3371
* Last Modified: January 07, 2009
* Article: HT3371
Summary
The battery in the MacBook Pro (17-inch, Early 2009) should be replaced only by an Apple Authorized Service Provider. Please do not attempt to replace the battery in your MacBook Pro yourself.
Products Affected
MacBook Pro (17-inch, Early 2009)
Battery replacement should be performed only by an Apple Authorized Service Provider or at an Apple retail store. Attempting a battery replacement yourself could damage your equipment and
void its warranty.
Additional Information
Read frequently asked questions about replacing the battery in your MacBook Pro (17-inch, Early 2009).