4400 mAh 10.8 v // Compatible with : Models MacBook 13" A1278 (2008 and earlier versions)MacBook 13" Aluminum Unibody (2008 Version)MacBook 13" MB466*/AMacBook 13" MB466CH/AMacBook 13" MB466J/AMacBook 13" MB466LL/AMacBook 13" MB466X/AMacBook 13" MB467*/AMacBook 13" MB467CH/AMacBook 13" MB467J/AMacBook 13" MB467LL/AMacBook 13" MB467X/AMacBook 13.3" MC516CH/A