Your device shipped with an 85w power adapter, so the rest of the specs
and version build order model number are helpful to attempt to match a
replacement MagSafe adapter with the computer. Looks to be MagSafe1.
The following part works for the non-Retina models as noted.
For all 2006 to 2011, 2012 (Non-Retina) MacBook Pro 13", 15", 17" Models.
Flip Plug Included. Bulk Packaged. 1 Year OWC Fulfilled Warranty.
There are additional MagSafe adapters here, to include later MagSafe2:
https://eshop.macsales.com/search/magsafe+adapters
The only MacBook Pro Mid 2009 with 2.66 processor would be 15-inch:
{altogether there are four mid-2009 macbook pro builds per mactracker.ca}
Introduced June 2009
Discontinued April 2010
Model Identifier MacBookPro5,3
Model Number A1286
EMC 2325
Order Number MB985LL/A (2.66 GHz), MB986LL/A (2.8 GHz)
If you mis-identified the MacBook Pro, use a serial number lookup to help
acquire the correct replacement or upgrade parts. Or ask a reputable vendor
(customer service) for help based on information you can tell them.
• Mac Serial Number Info - Lookup your Apple serial number:
https://www.powerbookmedic.com/identify-mac-serial.php
A correct part listed above is from macsales OWC, a reputable reseller with
the proper part & fair price. This is an example; other vendors may offer a
copy or unofficial duplicate of lesser quality. Sometimes this vendor has a
replacement battery listed, depending on stock number.
Good luck & happy computer! 🙂