This is a generic, equivalent one, 100% compatible. This 10.95V 5500mAh Replacement Laptop battery is designed to compatible with Apple A1331, A1342, 661-5391, 020-6580-A.

Specifications:
* Product Type: generic/equivalent
* Battery Voltage: 10.95V
* Battery Capacity: 5500mAh/60Wh
* Chemistry: Li-ion
* Condition: new, 1 Year Warranty!
* No memory effect, Over-charge protection, Over-discharge protection.
* Over-heat protection, Over-current protection, Short-circuit protection.

Compatible Part Numbers:
A1331, A1342, 661-5391, 020-6580-A

Compatible with the following Apple Laptop models:
MacBook 13"
MacBook Unibody 13"
MacBook Pro 15"
MacBook Pro 17"
MacBook Pro Unibody 15"
MacBook Air
MacBook Air MC234LL/A 13.3-Inch
MacBook Air MC233LL/A 13.3-Inch
MacBook Pro 13.3-Inch
MacBook Pro MC375LL/A 13.3-Inch
MacBook Pro 15" series
MacBook Pro MB985LL/A 15.4-Inch
MacBook Pro MC118LL/A 15.4-Inch
MacBook Pro MC373LL/A 15.4-Inch
MacBook Pro MC372LL/A 15.4-Inch
MacBook Pro MB133LL/A 15.4-inch
MacBook Pro MB471LL/A 15.4-Inch
MacBook Pro MB134LL/A 15.4-inch
MacBook Pro MB470LL/A 15.4-Inch
MacBook Pro 17" series
MacBook Pro MC024LL/A 17-Inch Laptop
MacBook Pro MC226LL/A 17-Inch Laptop
MacBook Pro MB076LL/A 17-inch Laptop
MacBook Pro MB766LL/A 17-Inch Laptop
MacBook Pro MB604LL/A 17-Inch Laptop

Package Included:
1 x 5500mAh Replacement Laptop Battery for Apple A1331 A1342 661-5391 020-6580-A