Mine shipped with a 60 or 65W charger.  Could NOT figure out why, after 2 hours of playing Civilization 5 (hardly a difficult game for this beast to run... it was released in 2010), WHILE plugged in, all of a sudden the performance significantly dropped.  I checked the OS X performance monitor and noted that the processor was drawing some 65% of its usage for "system" ????Eventually figured out that the battery was <1% and the processor was likely trying its best to manage applications on low power.  Once I charged back up, no issues.Do yourself a favor and invest in a 100W USB-C charger.  They're cheap.  Problem solved.Some small scratches on the lid.  Irritating but hardly a dealbreaker.