Original Laptop Battery for Apple MacBook Pro Unibody 13 "A1322 A1278 Apple MacBook Pro 13" Series MacBook Pro 13 "A1278 (2009 version), MacBook Pro 13" MB990 * / A MacBook Pro 13 "MB990CH / A MacBook Pro 13" MB990J / A MacBook Pro 13 "MB990LL / A, MacBook Pro 13" MB990TA / A MacBook Pro 13 "MB990ZP / A MacBook Pro 13" MB991 * / A MacBook Pro 13 "MB991CH / A MacBook Pro 13" MB991J / A MacBook Pro 13 "MB991LL / A, MacBook Pro 13" MB991TA / A MacBook Pro 13 "Precision aluminum unibody (2009 version), MacBook Pro 13" MB991ZP / A 5
Original Laptop Battery for Apple MacBook Pro Unibody 13 "A1322 A1278 Apple MacBook Pro 13" Series MacBook Pro 13 "A1278 (2009 version), MacBook Pro 13" MB990 * / A MacBook Pro 13 "MB990CH / A MacBook Pro 13" MB990J / A MacBook Pro 13 "MB990LL / A, MacBook Pro 13" MB990TA / A MacBook Pro 13 "MB990ZP / A MacBook Pro 13" MB991 * / A MacBook Pro 13 "MB991CH / A MacBook Pro 13" MB991J / A MacBook Pro 13 "MB991LL / A, MacBook Pro 13" MB991TA / A MacBook Pro 13 "Precision aluminum unibody (2009 version), MacBook Pro 13" MB991ZP / A
The battery has perfectly fit into my 13 "Macbook Pro 5.5 (mid 2009). The triangular screws are a bit tricky without proper screwdriver ...
So far the battery is running without problems. Coconut Battery confirms the battery 0 charge cycles and a "planned capacity" of 5450 mAh and a "Current Capacity" of 5850 mAh at the beginning.