Extended Performance Replacement Battery for select APPLE A1322, MacBook Pro 13" A1278 (2009 Version), MB990*/A, MB990CH/A, MB990J/A, MB990LL/A, MB990TA/A, MB990ZP/A, MB991*/A, MB991CH/A, MB991J/A, MB991LL/A, MB991TA/A, MB991ZP/A, Precision Aluminum Unibody (2009 Version), A1322 ( 4200 mAh ) 18 Months Manufacturer Warranty, 100% Satisfaction Guaranteed 100% Compatible Non-OEM : Lithium Ion (Li- ion) Long Life Battery: Rechargable with No Memory Effect and Power Surge Protection 4200 mAh Capacity, 11.1V Volts Protective Retail Packaging, Each Battery is Sealed with Anti-Static Shield Sleeve. Exclusive Offering of a Durable, High Performance, Extended Life Grade A Battery