Because this is a 17" laptop, you will experience shorter run times than a similar 15 inch or 13 inch MacBook model. The large lighted display is the main drain on this battery. You can expect about 2-3 hours of run time with this Apple A1309 battery when new, depending on your energy use. The higher capacity battery cells inside this cartridge have an energy capacity of 95 Whr.
Fits Early 2009 17" Unibody MacBook Pro
Fits Mid 2009 17" Unibody MacBook Pro
Fits Mid 2010 17" Unibody MacBook Pro