Get power when and where you need it with a spare genuine thinkpad ac adaptor keep one in the office one at home and another in your carrying case for convenient access to power wherever a wall outlet is available the thinkpad 90w ac adaptor for x1 carbon offers the same specifications as the standard ac adaptor that ships with the thinkpad x1 carbon laptop features amp benefits for use with the thinkpad x1 carbon new plug design second adapter for home or travel thinkpad branded 1 y