Replacement adapter for APPLE MacBook Air MB003LL/A MB543LLA MB940LL/A MC233LL/A MC234LL/A MC503LL/A MC504LL/A MC505LL/A MC506LL/A MC506X/A Replaces A1237 A1244 MB283LL/A ADP-54GD MC747LL/A MB283LL Specs 14.5V 3.1A 45Watt