It works fine, but is missing some circuitry to satisfy the laptop charging system, Surface-1800 44W AC Adapter Charger 15V 2.58A 5V 1A, Truckee California, 96161
Surface-1800 44W AC Adapter Charger 15V 2.58A 5V 1A
Genuine 130W Slim Dell Studio 1536 1537 1555 AC Adapter Charger
The charger works just fine, but the charging system complains when you plug it in. In fact the charging system says it will charge he laptop, but it lacks some management circuitry. A small annoyance.